diff --git a/INSTALL b/INSTALL
index 0ed22dc7..ee4809ca 100644
--- a/INSTALL
+++ b/INSTALL
@@ -8,8 +8,8 @@ make install
 
 This will configure, build, and install medit to /usr/local.
 
-medit requires development packages of the following: gtk2, libxml2, python2.
-For example, on Debian you may need to install libgtk2.0-dev, libxml2-dev, python2.7-dev.
+medit requires development packages of the following: gtk2, libxml2, python2, pygtk2.
+For example, on Debian you may need to install libgtk2.0-dev, libxml2-dev, python2.7-dev, python-gtk2-dev.
 
 If you checked out a copy of mercurial repository, then do the following to build: