diff --git a/qutebrowser/completion/models/urlmodel.py b/qutebrowser/completion/models/urlmodel.py
index 6cb3b1501..1f06fe861 100644
--- a/qutebrowser/completion/models/urlmodel.py
+++ b/qutebrowser/completion/models/urlmodel.py
@@ -81,6 +81,7 @@ def url(*, info):
         models["history"] = hist_cat
 
     for category in categories:
-        model.add_category(models[category])
+        if category in models:
+            model.add_category(models[category])
         
     return model