diff --git a/src/utictactoe.c b/src/utictactoe.c
index 9f965ca..469f65f 100644
--- a/src/utictactoe.c
+++ b/src/utictactoe.c
@@ -104,7 +104,7 @@ int main(int argc, char* argv[]) {
 
         case 'c':
             if ( OPTIONAL_ARGUMENT_IS_PRESENT ) {
-                if ( access(optarg, F_OK) != -1) {
+                if ( access(optarg, F_OK) == 0) {
                     printf("Contest file valid\n");
                 }
                 else {