diff --git a/src/generic/splitter.cpp b/src/generic/splitter.cpp
index 5ba2ae92b8..d3ed2d45c9 100644
--- a/src/generic/splitter.cpp
+++ b/src/generic/splitter.cpp
@@ -213,10 +213,10 @@ void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
     // following the mouse movement while it drags the sash, without it we only
     // draw the sash at the new position but only resize the windows when the
     // dragging is finished
-#if defined( __WXMAC__ ) && TARGET_API_MAC_OSX == 1
-    bool isLive = true ;
+#if defined( __WXMAC__ ) && defined(TARGET_API_MAC_OSX) && TARGET_API_MAC_OSX == 1
+    bool isLive = true ; // FIXME: why?
 #else
-    bool isLive = (GetWindowStyleFlag() & wxSP_LIVE_UPDATE) != 0;
+    bool isLive = HasFlag(wxSP_LIVE_UPDATE);
 #endif
     if (event.LeftDown())
     {