diff --git a/which.spec b/which.spec
index 764f363..a1c29f4 100644
--- a/which.spec
+++ b/which.spec
@@ -1,7 +1,7 @@
 Summary: Displays where a particular program in your path is located
 Name: which
 Version: 2.21
-Release: 17%{?dist}
+Release: 18%{?dist}
 License: GPLv3
 Source0: http://ftp.gnu.org/gnu/which/%{name}-%{version}.tar.gz
 Source1: which2.sh
@@ -39,6 +39,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 %{_mandir}/man1/which.1*
 
 %changelog
+* Tue Mar 24 2020 Than Ngo <than@redhat.com> - 2.21-18
+- set correct alias for mksh
+
 * Fri Jan 31 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.21-17
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild
 
diff --git a/which2.sh b/which2.sh
index 1f394ac..4e69626 100644
--- a/which2.sh
+++ b/which2.sh
@@ -1,6 +1,6 @@
 # Initialization script for bash and sh
 
-if [ "$0" == "ksh" -o "$0" == "-ksh" ] ; then
+if [ "$0" == "ksh" -o "$0" == "-ksh" -o "$0" == "mksh" -o "$0" == "-mksh" ] ; then
   alias which='(alias; typeset -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot'
 else
   alias which='(alias; declare -f) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot'