diff --git a/lib/ipdb_debugging.py b/lib/ipdb_debugging.py
index 33782dcb1..3017f674b 100644
--- a/lib/ipdb_debugging.py
+++ b/lib/ipdb_debugging.py
@@ -3,5 +3,5 @@
 import ipdb
 
 def plus_two(num):
-    num + 2
+    num= num + 2
     return num