diff --git a/sh/alias/mkdir.sh b/sh/alias/mkdir.sh
index 961e14b..ae8ac4b 100644
--- a/sh/alias/mkdir.sh
+++ b/sh/alias/mkdir.sh
@@ -1,11 +1,13 @@
 # make a directory
-md() {
+md() { sh_a__make_directory "${@}"; }
+sh_a__make_directory() {
 	mkdir \
 		"${@}"
 }
 
 # make a directory after making its parents
-mdp() {
+mdp() { sh_a__make_directory_parents "${@}"; }
+sh_a__make_directory_parents() {
 	mkdir \
 		--parents \
 		"${@}"