diff --git a/include/wx/mac/private/print.h b/include/wx/mac/private/print.h
index 7052401ca6..150be6d99f 100644
--- a/include/wx/mac/private/print.h
+++ b/include/wx/mac/private/print.h
@@ -1,4 +1,4 @@
-#if __WXMAC_CLASSIC__
+#ifdef __WXMAC_CLASSIC__
 #include "wx/mac/classic/private/print.h"
 #else
 #include "wx/mac/carbon/private/print.h"
diff --git a/src/mac/carbon/listbox.cpp b/src/mac/carbon/listbox.cpp
index 3a94f14a54..3ed2418065 100644
--- a/src/mac/carbon/listbox.cpp
+++ b/src/mac/carbon/listbox.cpp
@@ -27,7 +27,7 @@
 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
 
 BEGIN_EVENT_TABLE(wxListBox, wxControl)
-#if !__WXMAC_OSX__
+#ifndef __WXMAC_OSX__
     EVT_SIZE( wxListBox::OnSize )
     EVT_CHAR( wxListBox::OnChar )
 #endif