diff --git a/coco/api.py b/coco/api.py
index 8fed040d47..6c57eb8506 100644
--- a/coco/api.py
+++ b/coco/api.py
@@ -666,6 +666,7 @@ def dehydrate_farmer_groups_targeted(self, bundle):
     
     def all_category(self, bundle, list_queryset):
         data_list= [] 
+        int_pma_db_list = []
         int_db_list = [int(item) for item in mapping_dict.keys()]
         # list_queryset = list_queryset
         for pma in filter(None, list_queryset):