diff --git a/delojza.py b/delojza.py
index 689efd9..f7d0f35 100755
--- a/delojza.py
+++ b/delojza.py
@@ -73,6 +73,8 @@ class DelojzaBot:
         if tumblr_name and tumblr_keys:
             self.tumblr_name = tumblr_name
             self.tumblr_client = pytumblr.TumblrRestClient(*tumblr_keys)
+        else:
+            self.tumblr_client = None
 
         self.protected_chats = protected_chats or []
         self.protected_tags = protected_tags or []