diff --git a/src/unity.c b/src/unity.c
index b5c788e93529cbf38c04332759cad6760230242c..e8cc6075968bb6b5b03032a0d3dfb69565ac5bf3 100644
--- a/src/unity.c
+++ b/src/unity.c
@@ -956,7 +956,7 @@ void UnityAssertDoubleSpecial(const _UD actual,
 #endif // not UNITY_EXCLUDE_DOUBLE
 
 //-----------------------------------------------
-void UnityAssertNumbersWithin( const _U_SINT delta,
+void UnityAssertNumbersWithin( const _U_UINT delta,
                                const _U_SINT expected,
                                const _U_SINT actual,
                                const char* msg,
@@ -968,23 +968,23 @@ void UnityAssertNumbersWithin( const _U_SINT delta,
     if ((style & UNITY_DISPLAY_RANGE_INT) == UNITY_DISPLAY_RANGE_INT)
     {
         if (actual > expected)
-          Unity.CurrentTestFailed = ((actual - expected) > delta);
+            Unity.CurrentTestFailed = ((_U_UINT)(actual - expected) > delta);
         else
-          Unity.CurrentTestFailed = ((expected - actual) > delta);
+            Unity.CurrentTestFailed = ((_U_UINT)(expected - actual) > delta);
     }
     else
     {
         if ((_U_UINT)actual > (_U_UINT)expected)
-            Unity.CurrentTestFailed = ((_U_UINT)(actual - expected) > (_U_UINT)delta);
+            Unity.CurrentTestFailed = ((_U_UINT)(actual - expected) > delta);
         else
-            Unity.CurrentTestFailed = ((_U_UINT)(expected - actual) > (_U_UINT)delta);
+            Unity.CurrentTestFailed = ((_U_UINT)(expected - actual) > delta);
     }
 
     if (Unity.CurrentTestFailed)
     {
         UnityTestResultsFailBegin(lineNumber);
         UnityPrint(UnityStrDelta);
-        UnityPrintNumberByStyle(delta, style);
+        UnityPrintNumberByStyle((_U_SINT)delta, style);
         UnityPrint(UnityStrExpected);
         UnityPrintNumberByStyle(expected, style);
         UnityPrint(UnityStrWas);
diff --git a/src/unity_internals.h b/src/unity_internals.h
index 81b32e225ea6551b7d00aa30a646c919604669cf..90cac977b18d32dd7bbf70724edb43c502c32fac 100644
--- a/src/unity_internals.h
+++ b/src/unity_internals.h
@@ -516,7 +516,7 @@ void UnityAssertEqualMemory( UNITY_INTERNAL_PTR expected,
                              const char* msg,
                              const UNITY_LINE_TYPE lineNumber);
 
-void UnityAssertNumbersWithin(const _U_SINT delta,
+void UnityAssertNumbersWithin(const _U_UINT delta,
                               const _U_SINT expected,
                               const _U_SINT actual,
                               const char* msg,
@@ -648,17 +648,17 @@ extern const char UnityStrErr64[];
 #define UNITY_TEST_ASSERT_EQUAL_HEX32(expected, actual, line, message)                           UnityAssertEqualNumber((_U_SINT)(_US32)(expected), (_U_SINT)(_US32)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX32)
 #define UNITY_TEST_ASSERT_BITS(mask, expected, actual, line, message)                            UnityAssertBits((_U_SINT)(mask), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line))
 
-#define UNITY_TEST_ASSERT_INT_WITHIN(delta, expected, actual, line, message)                     UnityAssertNumbersWithin((_U_SINT)(delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT)
-#define UNITY_TEST_ASSERT_INT8_WITHIN(delta, expected, actual, line, message)                    UnityAssertNumbersWithin((_U_SINT)(_US8 )(delta), (_U_SINT)(_US8 )(expected), (_U_SINT)(_US8 )(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT8)
-#define UNITY_TEST_ASSERT_INT16_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_U_SINT)(_US16)(delta), (_U_SINT)(_US16)(expected), (_U_SINT)(_US16)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT16)
-#define UNITY_TEST_ASSERT_INT32_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_U_SINT)(_US32)(delta), (_U_SINT)(_US32)(expected), (_U_SINT)(_US32)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT32)
-#define UNITY_TEST_ASSERT_UINT_WITHIN(delta, expected, actual, line, message)                    UnityAssertNumbersWithin((_U_SINT)(delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT)
-#define UNITY_TEST_ASSERT_UINT8_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_U_SINT)(_U_UINT)(_UU8 )(delta), (_U_SINT)(_U_UINT)(_UU8 )(expected), (_U_SINT)(_U_UINT)(_UU8 )(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT8)
-#define UNITY_TEST_ASSERT_UINT16_WITHIN(delta, expected, actual, line, message)                  UnityAssertNumbersWithin((_U_SINT)(_U_UINT)(_UU16)(delta), (_U_SINT)(_U_UINT)(_UU16)(expected), (_U_SINT)(_U_UINT)(_UU16)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT16)
-#define UNITY_TEST_ASSERT_UINT32_WITHIN(delta, expected, actual, line, message)                  UnityAssertNumbersWithin((_U_SINT)(_U_UINT)(_UU32)(delta), (_U_SINT)(_U_UINT)(_UU32)(expected), (_U_SINT)(_U_UINT)(_UU32)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT32)
-#define UNITY_TEST_ASSERT_HEX8_WITHIN(delta, expected, actual, line, message)                    UnityAssertNumbersWithin((_U_SINT)(_U_UINT)(_UU8 )(delta), (_U_SINT)(_U_UINT)(_UU8 )(expected), (_U_SINT)(_U_UINT)(_UU8 )(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX8)
-#define UNITY_TEST_ASSERT_HEX16_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_U_SINT)(_U_UINT)(_UU16)(delta), (_U_SINT)(_U_UINT)(_UU16)(expected), (_U_SINT)(_U_UINT)(_UU16)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX16)
-#define UNITY_TEST_ASSERT_HEX32_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_U_SINT)(_U_UINT)(_UU32)(delta), (_U_SINT)(_U_UINT)(_UU32)(expected), (_U_SINT)(_U_UINT)(_UU32)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX32)
+#define UNITY_TEST_ASSERT_INT_WITHIN(delta, expected, actual, line, message)                     UnityAssertNumbersWithin((delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT)
+#define UNITY_TEST_ASSERT_INT8_WITHIN(delta, expected, actual, line, message)                    UnityAssertNumbersWithin((_UU8 )(delta), (_U_SINT)(_US8 )(expected), (_U_SINT)(_US8 )(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT8)
+#define UNITY_TEST_ASSERT_INT16_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_UU16)(delta), (_U_SINT)(_US16)(expected), (_U_SINT)(_US16)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT16)
+#define UNITY_TEST_ASSERT_INT32_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_UU32)(delta), (_U_SINT)(_US32)(expected), (_U_SINT)(_US32)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT32)
+#define UNITY_TEST_ASSERT_UINT_WITHIN(delta, expected, actual, line, message)                    UnityAssertNumbersWithin((delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT)
+#define UNITY_TEST_ASSERT_UINT8_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_UU8 )(delta), (_U_SINT)(_U_UINT)(_UU8 )(expected), (_U_SINT)(_U_UINT)(_UU8 )(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT8)
+#define UNITY_TEST_ASSERT_UINT16_WITHIN(delta, expected, actual, line, message)                  UnityAssertNumbersWithin((_UU16)(delta), (_U_SINT)(_U_UINT)(_UU16)(expected), (_U_SINT)(_U_UINT)(_UU16)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT16)
+#define UNITY_TEST_ASSERT_UINT32_WITHIN(delta, expected, actual, line, message)                  UnityAssertNumbersWithin((_UU32)(delta), (_U_SINT)(_U_UINT)(_UU32)(expected), (_U_SINT)(_U_UINT)(_UU32)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT32)
+#define UNITY_TEST_ASSERT_HEX8_WITHIN(delta, expected, actual, line, message)                    UnityAssertNumbersWithin((_UU8 )(delta), (_U_SINT)(_U_UINT)(_UU8 )(expected), (_U_SINT)(_U_UINT)(_UU8 )(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX8)
+#define UNITY_TEST_ASSERT_HEX16_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_UU16)(delta), (_U_SINT)(_U_UINT)(_UU16)(expected), (_U_SINT)(_U_UINT)(_UU16)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX16)
+#define UNITY_TEST_ASSERT_HEX32_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_UU32)(delta), (_U_SINT)(_U_UINT)(_UU32)(expected), (_U_SINT)(_U_UINT)(_UU32)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX32)
 
 #define UNITY_TEST_ASSERT_EQUAL_PTR(expected, actual, line, message)                             UnityAssertEqualNumber((_U_SINT)(_UP)(expected), (_U_SINT)(_UP)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_POINTER)
 #define UNITY_TEST_ASSERT_EQUAL_STRING(expected, actual, line, message)                          UnityAssertEqualString((const char*)(expected), (const char*)(actual), (message), (UNITY_LINE_TYPE)(line))
@@ -687,9 +687,9 @@ extern const char UnityStrErr64[];
 #define UNITY_TEST_ASSERT_EQUAL_INT64_ARRAY(expected, actual, num_elements, line, message)       UnityAssertEqualIntArray((UNITY_INTERNAL_PTR)(expected), (UNITY_INTERNAL_PTR)(actual), (_UU32)(num_elements), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT64)
 #define UNITY_TEST_ASSERT_EQUAL_UINT64_ARRAY(expected, actual, num_elements, line, message)      UnityAssertEqualIntArray((UNITY_INTERNAL_PTR)(expected), (UNITY_INTERNAL_PTR)(actual), (_UU32)(num_elements), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT64)
 #define UNITY_TEST_ASSERT_EQUAL_HEX64_ARRAY(expected, actual, num_elements, line, message)       UnityAssertEqualIntArray((UNITY_INTERNAL_PTR)(expected), (UNITY_INTERNAL_PTR)(actual), (_UU32)(num_elements), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX64)
-#define UNITY_TEST_ASSERT_INT64_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_U_SINT)(delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT64)
-#define UNITY_TEST_ASSERT_UINT64_WITHIN(delta, expected, actual, line, message)                  UnityAssertNumbersWithin((_U_SINT)(delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT64)
-#define UNITY_TEST_ASSERT_HEX64_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((_U_SINT)(delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX64)
+#define UNITY_TEST_ASSERT_INT64_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_INT64)
+#define UNITY_TEST_ASSERT_UINT64_WITHIN(delta, expected, actual, line, message)                  UnityAssertNumbersWithin((delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_UINT64)
+#define UNITY_TEST_ASSERT_HEX64_WITHIN(delta, expected, actual, line, message)                   UnityAssertNumbersWithin((delta), (_U_SINT)(expected), (_U_SINT)(actual), (message), (UNITY_LINE_TYPE)(line), UNITY_DISPLAY_STYLE_HEX64)
 #else
 #define UNITY_TEST_ASSERT_EQUAL_INT64(expected, actual, line, message)                           UNITY_TEST_FAIL((UNITY_LINE_TYPE)(line), UnityStrErr64)
 #define UNITY_TEST_ASSERT_EQUAL_UINT64(expected, actual, line, message)                          UNITY_TEST_FAIL((UNITY_LINE_TYPE)(line), UnityStrErr64)