diff --git a/fl_server_api/views/inference.py b/fl_server_api/views/inference.py
index 1883973..3e82b19 100644
--- a/fl_server_api/views/inference.py
+++ b/fl_server_api/views/inference.py
@@ -206,7 +206,7 @@ def _get_model_input(self, request: HttpRequest, request_body: dict) -> Any:
         else:
             model_input = request_body.get("model_input", None)
         if not model_input:
-            raise ValidationError("No uploaded file 'model_input' not found.")
+            raise ValidationError("No uploaded file 'model_input' found.")
         return self._try_decode_model_input(model_input)
 
     def _try_decode_model_input(self, model_input: Any) -> Any: