diff --git a/du3/program.c b/du3/program.c
index dc96e33..ca8ba70 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -16,7 +16,7 @@ void init_stack(struct stack* s) {
 
 int push_stack(struct stack* s, float znac) {
     if (s->size >= STACK_SIZE) {
-        printf("stack overflow\n");
+        printf("not enough operands\n");
         return 0;
     }
     s->values[s->size++] = znac;