diff --git a/bin/+decor b/bin/+decor
index 257e6be..56df9c7 100755
--- a/bin/+decor
+++ b/bin/+decor
@@ -1 +1,8 @@
-xprop -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x1, 0x0, 0x0"
+#!/bin/sh
+
+if [ -z "$1" ]
+then win_id=$(xwininfo | awk 'match($0, /Window id: (0x[0-9a-f]+)/, cap){print cap[1]}')
+else win_id=$1
+fi
+
+xprop -id $win_id -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x1, 0x0, 0x0"
diff --git a/bin/-decor b/bin/-decor
index b2b4da3..b78465a 100755
--- a/bin/-decor
+++ b/bin/-decor
@@ -1 +1,8 @@
-xprop -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x0, 0x0, 0x0"
+#!/bin/sh
+
+if [ -z "$1" ]
+then win_id=$(xwininfo | awk 'match($0, /Window id: (0x[0-9a-f]+)/, cap){print cap[1]}')
+else win_id=$1
+fi
+
+xprop -id $win_id -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x0, 0x0, 0x0"