diff --git a/njvm.c b/njvm.c
index 47abdca..d9dcb4c 100644
--- a/njvm.c
+++ b/njvm.c
@@ -106,6 +106,7 @@ void execute(struct program program) {
                 break;
             case RSF:
                 if (debug == 1) printf("rsf\n");
+                if (debug == 1) printf("pop: %i\n", peek(stack, 1));
                 *stack.current = fp + 2;
                 fp = pop(stack);
                 break;