diff --git a/smash/web/api_views.py b/smash/web/api_views.py
index e021287345fe2887ab5473fe24ae2719f7ad15c5..a6fef53f975fc2d245a22b8f77870a88fc7f0a47 100644
--- a/smash/web/api_views.py
+++ b/smash/web/api_views.py
@@ -115,8 +115,11 @@ def get_subjects_filtered(subjects, filters):
             result = result.filter(postponed=(value == "true"))
         elif column == "default_location":
             result = result.filter(default_location=value)
+        elif column == "":
+            pass
         else:
-            print "UNKNOWN filter: " + row
+            print "UNKNOWN filter: "
+            print row
 
     return result