diff --git a/src/redturtle/volto/restapi/services/querystringsearch/get.py b/src/redturtle/volto/restapi/services/querystringsearch/get.py
index fab8a8a..ac5166e 100644
--- a/src/redturtle/volto/restapi/services/querystringsearch/get.py
+++ b/src/redturtle/volto/restapi/services/querystringsearch/get.py
@@ -117,6 +117,9 @@ def is_event_search(self, query):
         """
         Check if we need to perform a custom search with p.a.events method
         """
+        if not query:
+            return False
+
         indexes = [x["i"] for x in query]
 
         portal_type_check = False
diff --git a/src/redturtle/volto/tests/test_advancedsearch.py b/src/redturtle/volto/tests/test_advancedsearch.py
index b7ffc95..abf58c5 100644
--- a/src/redturtle/volto/tests/test_advancedsearch.py
+++ b/src/redturtle/volto/tests/test_advancedsearch.py
@@ -166,6 +166,10 @@ def test_search_by_not_handled_index_type_return_standard_order(self):
             ["f1", "d1", "e1"], [item["@id"].split("/")[-1] for item in result["items"]]
         )
 
+    def test_search_no_query(self):
+        response = self.api_session.post("/@querystring-search")
+        self.assertEqual(response.status_code, 400)
+
     def test_search_ignore_non_existent_indexes_and_return_custom_order_if_possible(
         self,
     ):