diff --git a/CONTRIBUTING.txt b/CONTRIBUTING.txt
index 7275cc30..73978b10 100644
--- a/CONTRIBUTING.txt
+++ b/CONTRIBUTING.txt
@@ -60,7 +60,7 @@ For a more detailed discussion, read these :doc:`detailed documents
 
     Finally, you must push your rebased branch::
 
-     git push -f origin transform-speedups
+     git push --force origin transform-speedups
 
    (If you are curious, here's a further discussion on
    the `dangers of rebasing <http://tinyurl.com/lll385>`__.  Also