diff --git a/flap/questions/retrolixToX86_64/02.retrolix b/flap/questions/retrolixToX86_64/02.retrolix
index d310d71..2d8f88a 100644
--- a/flap/questions/retrolixToX86_64/02.retrolix
+++ b/flap/questions/retrolixToX86_64/02.retrolix
@@ -4,5 +4,9 @@ globals (x, y, z, k)
   z <- mul y, x;
   k <- sub z, x;
 
+  debug:
+  %rdi <- copy k;
+  observe_int();
+
   exit;
 end
diff --git a/flap/questions/retrolixToX86_64/03.retrolix b/flap/questions/retrolixToX86_64/03.retrolix
index 8c45d15..8f9be40 100644
--- a/flap/questions/retrolixToX86_64/03.retrolix
+++ b/flap/questions/retrolixToX86_64/03.retrolix
@@ -5,5 +5,8 @@ globals (res)
   res <- mul res, 2;
   res <- mul res, 1;
 
+  debug:
+  %rdi <- copy res;
+  observe_int();
   exit;
 end