diff --git a/scripts/config b/scripts/config
index 2283be2bb62c..68041793698c 100755
--- a/scripts/config
+++ b/scripts/config
@@ -82,7 +82,7 @@ txt_subst() {
 	local infile="$3"
 	local tmpfile="$infile.swp"
 
-	sed -e "s/$before/$after/" "$infile" >"$tmpfile"
+	sed -e "s:$before:$after:" "$infile" >"$tmpfile"
 	# replace original file with the edited one
 	mv "$tmpfile" "$infile"
 }