diff --git a/ietf/doc/views_doc.py b/ietf/doc/views_doc.py
index 4c7d2164516..9bbb0068a27 100644
--- a/ietf/doc/views_doc.py
+++ b/ietf/doc/views_doc.py
@@ -162,7 +162,7 @@ def document_main(request, name, rev=None, document_html=False):
     snapshot = False
 
     gh = None
-    if rev != None:
+    if rev:
         # find the entry in the history
         for h in doc.history_set.order_by("-time"):
             if rev == h.rev: