diff --git a/PS1-completion-boo903362.patch b/PS1-completion-boo903362.patch
index 83a18ce..fa8284d 100644
--- a/PS1-completion-boo903362.patch
+++ b/PS1-completion-boo903362.patch
@@ -7,7 +7,7 @@
 @@ -1,5 +1,5 @@
  # Check for interactive bash and that we haven't already been sourced.
 -if [ -n "${BASH_VERSION-}" -a -n "${PS1-}" -a -z "${BASH_COMPLETION_VERSINFO-}" ]; then
-+if [[ -n "${BASH_VERSION-}" && $- =~ i && -z "${BASH_COMPLETION_VERSINFO-}" ]]; then
++if [[ -n "${BASH_VERSION-}" && $- = *i* && -z "${BASH_COMPLETION_VERSINFO-}" ]]; then
  
      # Check for recent enough version of bash.
      if [ ${BASH_VERSINFO[0]} -gt 4 ] || \
diff --git a/bash-completion.changes b/bash-completion.changes
index 4bab093..5698490 100644
--- a/bash-completion.changes
+++ b/bash-completion.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Oct 22 07:06:51 UTC 2018 - Dr. Werner Fink <werner@suse.de>
+
+- Modify patch PS1-completion-boo903362.patch to make it work with
+  mksh as well (boo#1104531)
+
 -------------------------------------------------------------------
 Thu Aug  2 13:25:06 UTC 2018 - antoine.belvire@opensuse.org