diff --git a/du3/program.c b/du3/program.c
index 8290c74..221fc1b 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -66,7 +66,7 @@ int main() {
                 case '/':
                     if (b == 0) {
                         printf("division by zero\n");
-                        return 1;
+                        return 0;
                     }
                     result = a/b;
                     break;