diff --git a/extras/fixture/test/unity_output_Spy.c b/extras/fixture/test/unity_output_Spy.c
index 5aa48f17ed46166ac68b4f710d9ad7e8e3c16238..54fca51bc103b98c2ee9f9a8bc3a02ba5f23563e 100644
--- a/extras/fixture/test/unity_output_Spy.c
+++ b/extras/fixture/test/unity_output_Spy.c
@@ -33,7 +33,7 @@ void UnityOutputCharSpy_Destroy(void)
     free(buffer);
 }
 
-int UnityOutputCharSpy_OutputChar(int c)
+void UnityOutputCharSpy_OutputChar(int c)
 {
     if (spy_enable)
     {
@@ -44,7 +44,6 @@ int UnityOutputCharSpy_OutputChar(int c)
     {
         putchar(c);
     }
-    return c;
 }
 
 const char * UnityOutputCharSpy_Get(void)
diff --git a/extras/fixture/test/unity_output_Spy.h b/extras/fixture/test/unity_output_Spy.h
index 791f6a58d6f8058084f6dba20b9f8f3fa1346873..6e7af7bf2c699a276fc0c22cbfd6e5e2f7da75d4 100644
--- a/extras/fixture/test/unity_output_Spy.h
+++ b/extras/fixture/test/unity_output_Spy.h
@@ -10,7 +10,7 @@
 
 void UnityOutputCharSpy_Create(int s);
 void UnityOutputCharSpy_Destroy(void);
-int  UnityOutputCharSpy_OutputChar(int c);
+void UnityOutputCharSpy_OutputChar(int c);
 const char * UnityOutputCharSpy_Get(void);
 void UnityOutputCharSpy_Enable(int enable);