diff --git a/docs/screenshot.md b/docs/screenshot.md
index 4ae84c3d..7f85224a 100644
--- a/docs/screenshot.md
+++ b/docs/screenshot.md
@@ -173,7 +173,7 @@ case "${1:-fullscreen}" in
     g=$(slurp -d); [ -z "$g" ] && exit 1
     grim -g "$g" "$filepath" ;;
   window)
-    g=$(mmsg -x | awk '/x / {x=$3} /y / {y=$3} /width / {w=$3} /height / {h=$3} END {print x","y" "w"x"h}')
+    g=$(mmsg get focusing-client | jq -r '"\(.x),\(.y) \(.width)x\(.height)"')
     [ -z "$g" ] && exit 1
     grim -g "$g" "$filepath" ;;
   freeze)