diff --git a/src/scripts/xzgrep.in b/src/scripts/xzgrep.in
index 511ea39c..46205512 100644
--- a/src/scripts/xzgrep.in
+++ b/src/scripts/xzgrep.in
@@ -147,7 +147,7 @@ while test $# -ne 0; do
   esac
 
   case $option in
-  (*\'?*)
+  (*\'*)
     option=\'$(printf '%sX\n' "$option" | LC_ALL=C sed "$escape");;
   (*)
     option="'$option'";;