diff --git a/testsuites/unittest/libc/sys/smoke/sys_test_005.cpp b/testsuites/unittest/libc/sys/smoke/sys_test_005.cpp
index d56cf2c3d09b58bda65342b73edd1037469a0d0c..0db849af4f57c7885cd2975d890332ffef30d0a5 100644
--- a/testsuites/unittest/libc/sys/smoke/sys_test_005.cpp
+++ b/testsuites/unittest/libc/sys/smoke/sys_test_005.cpp
@@ -37,7 +37,7 @@ static UINT32 TestCase(VOID)
     long x;
 
     x = random();
-    if (x > labs(MAX_RANDOM - 1)) {
+    if (x > static_cast<long>(MAX_RANDOM - 1)) {
         printf("[IN %s][line %d] x = %ld\n", __FUNCTION__, __LINE__, x);
         goto EXIT;
     }