diff --git a/lang/python39/Makefile.version b/lang/python39/Makefile.version
index 13e0f89db940..7c6dc83dd477 100644
--- a/lang/python39/Makefile.version
+++ b/lang/python39/Makefile.version
@@ -1,5 +1,7 @@
 # Mk/Uses/python.mk includes this file, don't remove it!
 
-# Do not forget to update python documentation (lang/python-doc-*)
-# Run "make -C lang/python-doc-html makesum"
+# Do not forget to
+# 1. Update python documentation (lang/python-doc-*)
+#    Run "make -C lang/python-doc-html makesum"
+# 2. Remove PORTREVISION in Makefile
 PYTHON_DISTVERSION=	3.9.13