--- scripts/xflock4.orig	2025-03-21 09:25:42 UTC
+++ scripts/xflock4
@@ -47,12 +47,12 @@ esac
 [ -t 0 ] && sleep 1
 
 # echo is used to strip blanks
-# $((2**31 - 1)) is MAXINT, which disables timeout: see
+# $(((1<<31)-1)) is MAXINT, which disables timeout: see
 # https://dbus.freedesktop.org/doc/api/html/group__DBusPendingCall.html
 ret=$(echo $(dbus-send --session \
                        --dest=org.xfce.SessionManager \
                        --print-reply=literal \
-                       --reply-timeout=$((2**31 - 1)) \
+                       --reply-timeout=$(((1<<31)-1)) \
                        --type=method_call \
                        /org/xfce/SessionManager \
                        org.xfce.Session.Manager.Lock))