diff --git a/apps/wpm/filters.py b/apps/wpm/filters.py
index 25a621b2..105cc6e6 100644
--- a/apps/wpm/filters.py
+++ b/apps/wpm/filters.py
@@ -90,7 +90,7 @@ class HandoverFilter(filters.FilterSet):
 
 
 class MlogbFilter(filters.FilterSet):
-    type = filters.CharFilter(label="in/out", filter_method='filter_type')
+    type = filters.CharFilter(label="in/out", method='filter_type')
     class Meta:
         model = Mlogb
         fields = {