diff --git a/du3/program.c b/du3/program.c
index b43126d..6f8d334 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -50,7 +50,7 @@ int main(){
 		if (*endptr == '\0') { // je cislo
 			if(mystack.size >= SIZE) {
 				printf("full stack\n");
-				return 1;
+				return 0;
 			}	
 		push(&mystack,num);
 		}