diff --git a/cv3/program.c b/cv3/program.c
index 891e7bc..3d9ae1e 100644
--- a/cv3/program.c
+++ b/cv3/program.c
@@ -74,7 +74,7 @@ int perform_operation(Calculator *calc, char op) {
     }
 
     print_stack(calc);
-    if(bub == 0) {
+    if(b != 0) {
         printf("no input\n"); 
      }
     return 1;