diff --git a/utils/configure.py b/utils/configure.py
index 2d63b0b0021b64f9d36acb9a80d1ed9385238416..99c04da309ee12630de778307d55146a91493f06 100644
--- a/utils/configure.py
+++ b/utils/configure.py
@@ -288,7 +288,7 @@ class PDConfig(object):
         if name in self.yaml_config:
             return self.yaml_config[name]
 
-        raise Warning("The argument %s is not defined." % name)
+        raise AttributeError("The argument %s is not defined." % name)
 
     def Print(self):