--- a/parser/c_compiler/main.c
+++ b/parser/c_compiler/main.c
@@ -22,7 +22,7 @@
 
     if (argc < 2) {
         usage (argv[0]);
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     if ((fp = fopen (argv[1], "r")) == NULL) {