diff --git a/du6/program.c b/du6/program.c
index 63ff121..ef83fbf 100644
--- a/du6/program.c
+++ b/du6/program.c
@@ -124,7 +124,7 @@ int main(void){
     }
     else{
         printf("\nNerozumiem\n");
-        return 10;
+        return 0;
     }
     }
     destroy_tree(tree);