diff --git a/src/c3nav/site/context_processors.py b/src/c3nav/site/context_processors.py
index 3594ea73..fee7a19b 100644
--- a/src/c3nav/site/context_processors.py
+++ b/src/c3nav/site/context_processors.py
@@ -23,5 +23,5 @@ def mobileclient(request):
 
 def user_data_json(request):
     return {
-        'user_data_json': lambda: json.dumps(dict(request.user_data), cls=DjangoJSONEncoder),
+        'user_data_json': lambda: json.dumps(dict(request.user_data), separators=(',', ':'), cls=DjangoJSONEncoder),
     }