diff --git a/openbox/prop.c b/openbox/prop.c
index d3f39e63..1412752a 100644
--- a/openbox/prop.c
+++ b/openbox/prop.c
@@ -172,7 +172,7 @@ void prop_startup()
 
     CREATE(openbox_pid, "_OPENBOX_PID");
     CREATE(ob_config, "_OB_CONFIG");
-    CREATE(ob_wm_action_undecorate, "_OB_WM_ACTION_UNDECORATED");
+    CREATE(ob_wm_action_undecorate, "_OB_WM_ACTION_UNDECORATE");
     CREATE(ob_wm_state_undecorated, "_OB_WM_STATE_UNDECORATED");
     CREATE(ob_control, "_OB_CONTROL");
 }