diff --git a/searx/exceptions.py b/searx/exceptions.py
index c605ddca..0175acfa 100644
--- a/searx/exceptions.py
+++ b/searx/exceptions.py
@@ -28,5 +28,6 @@ class SearxParameterException(SearxException):
         else:
             message = 'Invalid value "' + value + '" for parameter ' + name
         super(SearxParameterException, self).__init__(message)
+        self.message = message
         self.parameter_name = name
         self.parameter_value = value