1 files changed, 1 insertions, 0 deletions
diff --git a/obt/prop.c b/obt/prop.c
index d5af6a0b..638373fd 100644
--- a/obt/prop.c
+++ b/obt/prop.c
@@ -107,6 +107,7 @@ void obt_prop_startup(void)
     CREATE_(NET_WM_ICON_GEOMETRY);
     CREATE_(NET_WM_PID);
     CREATE_(NET_WM_ALLOWED_ACTIONS);
+    CREATE_(NET_WM_WINDOW_OPACITY);
     CREATE_(NET_WM_USER_TIME);
 /*  CREATE_(NET_WM_USER_TIME_WINDOW); */
     CREATE_(KDE_NET_WM_FRAME_STRUT);