diff --git a/check_systemdunit b/check_systemdunit
index e04f6c39543cfb248344de547461f424489f8b58..2f62cb9b6c4aa3a80f564de2043cebe3f16610c1 100755
--- a/check_systemdunit
+++ b/check_systemdunit
@@ -103,7 +103,7 @@ fi
 # --- find a service by regex
 if ph.hasParamoption "r" "$@" ; then
   _regex="${2}"
-  _list=$( _getUnits | awk '{ print $1 }' | grep -v '[^a-z\.\-]' | sort )
+  _list=$( _getUnits | awk '{ print $1 }' | sort )
   _unit=$( grep -E "$_regex" <<< "$_list" )
 
   if [ -z "$_unit" ]; then