diff --git a/application/tests/web_main_test.py b/application/tests/web_main_test.py
index 9e219b4ce..322d47515 100644
--- a/application/tests/web_main_test.py
+++ b/application/tests/web_main_test.py
@@ -475,6 +475,14 @@ def test_test_search(self) -> None:
                 self.assertEqual(200, resp.status_code)
                 self.assertDictEqual(resp.json[0], expected[0])
 
+    def test_text_search_missing_param(self) -> None:
+        with self.app.test_client() as client:
+            response = client.get("/rest/v1/text_search")
+            self.assertEqual(400, response.status_code)
+
+            response = client.get("/rest/v1/text_search?text=")
+            self.assertEqual(400, response.status_code)
+
     def test_find_root_cres(self) -> None:
         self.maxDiff = None
         collection = db.Node_collection().with_graph()
diff --git a/application/web/web_main.py b/application/web/web_main.py
index 29567470a..3e76fab9c 100644
--- a/application/web/web_main.py
+++ b/application/web/web_main.py
@@ -472,6 +472,8 @@ def text_search() -> Any:
     """
     database = db.Node_collection()
     text = request.args.get("text")
+    if not text:
+        abort(400, "text parameter is required")
     if posthog:
         posthog.capture(f"text_search", f"text:{text}")