diff --git a/du3/program.c b/du3/program.c
index 587f049..56969af 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -78,7 +78,7 @@ int main(){
 		}
 		else{
 			printf("bad input\n");
-			return 1;
+			return 0;
 		}
 		print (&mystack);
 	}