diff --git a/opencv.INSTALL b/opencv.INSTALL
index b09e5c0..2dd0ba6 100755
--- a/opencv.INSTALL
+++ b/opencv.INSTALL
@@ -23,7 +23,11 @@ echo -e "\n# virtualenv and virtualenvwrapper" >> ~/.profile
 echo "export WORKON_HOME=$HOME/.virtualenvs" >> ~/.profile
 echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.profile
 
-# Python2 or Python3
+# for Python2
+mkvirtualenv cv -p python3
+
+# for Python3
+export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
 mkvirtualenv cv -p python3
 
 # Change to env