diff --git a/cl/search/filters.py b/cl/search/filters.py
index 25a17ae64e..8c26165011 100644
--- a/cl/search/filters.py
+++ b/cl/search/filters.py
@@ -42,6 +42,7 @@ class Meta:
             "end_date": DATE_LOOKUPS,
             "short_name": ALL_TEXT_LOOKUPS,
             "full_name": ALL_TEXT_LOOKUPS,
+            "citation_string": ALL_TEXT_LOOKUPS
         }