diff --git a/src/msw/frame.cpp b/src/msw/frame.cpp
index 042978c4e8..ecc731a834 100644
--- a/src/msw/frame.cpp
+++ b/src/msw/frame.cpp
@@ -814,6 +814,8 @@ bool wxFrame::HandleSize(int WXUNUSED(x), int WXUNUSED(y), WXUINT id)
             IconizeChildFrames(true);
             break;
     }
+#else
+    wxUnusedVar(id);
 #endif // !__WXWINCE__
 
     if ( !m_iconized )