added 'PYTHON variable'

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/source/docs/howto_build_docs.rst b/doc/source/docs/howto_build_docs.rst
index fd1a26d1d..e017ef03f 100644
--- a/doc/source/docs/howto_build_docs.rst
+++ b/doc/source/docs/howto_build_docs.rst
@@ -56,7 +56,7 @@ in the ``doc/`` directory. If all goes well, this will generate a
 a message about ``installed numpy != current repo git version``, you must
 either override the check by setting ``GITVER`` or re-install NumPy.
 
-Note that if you have built numpy into a virtual enviornment and getting an error that says ``numpy not found, cannot build documentation without...`` you need to override the makefile variable at the commandline, so instead of writing ``make html`` write::
+Note that if you have built numpy into a virtual enviornment and getting an error that says ``numpy not found, cannot build documentation without...`` you need to override the makefile ``PYTHON`` variable at the commandline, so instead of writing ``make html`` write::
 
     make PYTHON=python html