diff --git a/sc2/build/unix/config_functions b/sc2/build/unix/config_functions
index 38642dc45..4419f7e38 100644
--- a/sc2/build/unix/config_functions
+++ b/sc2/build/unix/config_functions
@@ -493,9 +493,7 @@ have_library() {
 		TEMP_LDFLAGS=`evalVar LIB_${LIB}_LDFLAGS`
 
 		try_compile_c "$CFLAGS $TEMP_CFLAGS" "$LDFLAGS $TEMP_LDFLAGS" << EOF
-int main(int argc, char *argv[]) {
-	(void) argc;  /* Get rid of unused variable warning */
-	(void) argv;  /* Get rid of unused variable warning */
+int main(void) {
 	return 0;
 }
 EOF
@@ -712,7 +710,7 @@ have_header() {
 	try_compile_c "$CFLAGS $TEMP_CFLAGS" "$LDFLAGS $TEMP_LDFLAGS" << EOF > /dev/null 2>&1
 $EXTRA
 #include <$HEADER>
-int main() {
+int main(void) {
 	return 0;
 }
 EOF
@@ -765,7 +763,7 @@ $EXTRA
 #ifndef $MACRO
 #	error
 #endif
-int main() {
+int main(void) {
 	return 0;
 }
 EOF
@@ -833,7 +831,7 @@ check_endianness() {
 	else
 		# Detect endianness
 		try_compile_and_run_c "$CFLAGS" "$LDFLAGS" << EOF
-int main() {
+int main(void) {
 	int i;
 
 	i = 1;