diff --git a/lib/galaxy/model/__init__.py b/lib/galaxy/model/__init__.py
index b3abbdd02a0..2f570e377ec 100644
--- a/lib/galaxy/model/__init__.py
+++ b/lib/galaxy/model/__init__.py
@@ -398,7 +398,7 @@ class User(Dictifiable, RepresentById):
         extra_user_preferences = self.preferences.get('extra_user_preferences')
         if extra_user_preferences:
             try:
-                data = json.loads(extra_user_preferences)
+                data.update(json.loads(extra_user_preferences))
             except Exception:
                 pass
         return data