diff --git a/lcl/interfaces/win32/win32callback.inc b/lcl/interfaces/win32/win32callback.inc
index 9df3e011b9..4fbe0616d0 100644
--- a/lcl/interfaces/win32/win32callback.inc
+++ b/lcl/interfaces/win32/win32callback.inc
@@ -1724,6 +1724,9 @@ begin
     end;
     WM_GETMINMAXINFO:
       SetMinMaxInfo(PMINMAXINFO(LParam)^);
+    WM_HELP:
+      if Window = Win32WidgetSet.AppHandle then
+        Application.HelpCommand(0, LParam);
     WM_HSCROLL:
       HandleScrollMessage(LM_HSCROLL);
     WM_KEYDOWN: