diff --git a/u2/list_ops.py b/u2/list_ops.py
index 6214639..72b4ca4 100644
--- a/u2/list_ops.py
+++ b/u2/list_ops.py
@@ -1,6 +1,6 @@
 def length(l):
     count = 0
-    for item in range l:
+    for item in l:
         count +=1
     return count