diff --git a/wolfcrypt/benchmark/benchmark.c b/wolfcrypt/benchmark/benchmark.c
index 238d3ea61..054939494 100644
--- a/wolfcrypt/benchmark/benchmark.c
+++ b/wolfcrypt/benchmark/benchmark.c
@@ -7827,6 +7827,6 @@ int main(int argc, char** argv)
 
 #else
     #ifndef NO_MAIN_DRIVER
-        int main() { return 0; }
+        int main(void) { return 0; }
     #endif
 #endif /* !NO_CRYPT_BENCHMARK */