diff --git a/.local/bin/sd b/.local/bin/sd
index 7e09bf6..8047d33 100755
--- a/.local/bin/sd
+++ b/.local/bin/sd
@@ -2,10 +2,8 @@
 
 # Open a terminal window in the same directory as the currently active window.
 
-PID=$(xprop -id "$(xprop -root | xprop -root | sed -n "/_NET_ACTIVE_WINDOW/ s/^.*# // p")" | sed -n "/PID/ s/^.*= // p")
-PID="$(pstree -lpA "$PID")"
-PID="${PID##*"${SHELL##*/}"(}"
-PID="${PID#*lf(}"
-PID="${PID%%)*}"
-cd "$(readlink /proc/"$PID"/cwd)" || return 1
+PID=$(xprop -id "$(xprop -root | sed -n "/_NET_ACTIVE_WINDOW/ s/^.*# // p")" | sed -n "/PID/ s/^.*= // p")
+PID=$(pstree -lpATna "$PID" | grep -v '\-\(lf,[0-9]\+ -server\|(st-urlhandler,[0-9]\+)\|xclip,[0-9]\+\)' | sed '$s/.*,\([0-9]\+\).*/\1/;t;d')
+cwd=$(readlink /proc/"$PID"/cwd)
+[ "$PWD" != "$cwd" ] && [ -d "$cwd" ] && { cd "$cwd" || exit 1; }
 "$TERMINAL"