diff --git a/programs/explorer/systray.c b/programs/explorer/systray.c
index 5f4fc60dbf3..161b4b57e58 100644
--- a/programs/explorer/systray.c
+++ b/programs/explorer/systray.c
@@ -731,7 +731,7 @@ static BOOL notify_owner( struct icon *icon, UINT msg, POINT pt )
     }
 
     TRACE( "relaying 0x%x\n", msg );
-    if (!PostMessageW( icon->owner, icon->callback_message, wp, lp ) &&
+    if (!SendNotifyMessageW( icon->owner, icon->callback_message, wp, lp ) &&
         (GetLastError() == ERROR_INVALID_WINDOW_HANDLE))
     {
         WARN( "application window was destroyed, removing icon %u\n", icon->id );