diff --git a/du3/program.c b/du3/program.c
index d88b999..7e8376b 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -29,7 +29,7 @@ struct stack* create_stack (int capacity) {
 void push_stack(struct stack* s, float value) {
     if (s->size >= s->capacity) {
         printf("full stack\n");
-        exit(1);
+        exit(0);
     }
     s->values[s->size] = value;
     s->size++;