diff --git a/IPython/external/mathjax.py b/IPython/external/mathjax.py
index dea19cd..1b9b809 100644
--- a/IPython/external/mathjax.py
+++ b/IPython/external/mathjax.py
@@ -9,5 +9,5 @@ mathjax is now install by default with the notebook package
 import sys 
 
 if __name__ == '__main__' :
-    sys.exit("IPython.external.mathjax is deprecated")
+    sys.exit("IPython.external.mathjax is deprecated, Mathjax is now installed by default with the notebook package")