diff --git a/include/wx/palette.h b/include/wx/palette.h
index c9aa1e90e8..84f6bd8151 100644
--- a/include/wx/palette.h
+++ b/include/wx/palette.h
@@ -7,6 +7,8 @@
 #include "wx/motif/palette.h"
 #elif defined(__WXGTK__)
 #include "wx/generic/paletteg.h"
+#elif defined(__WXMGL__)
+#include "wx/mgl/palette.h"
 #elif defined(__WXQT__)
 #include "wx/qt/palette.h"
 #elif defined(__WXMAC__)
diff --git a/include/wx/pen.h b/include/wx/pen.h
index 62bdd7dc6e..0067885a40 100644
--- a/include/wx/pen.h
+++ b/include/wx/pen.h
@@ -7,6 +7,8 @@
 #include "wx/motif/pen.h"
 #elif defined(__WXGTK__)
 #include "wx/gtk/pen.h"
+#elif defined(__WXMGL__)
+#include "wx/mgl/pen.h"
 #elif defined(__WXQT__)
 #include "wx/qt/pen.h"
 #elif defined(__WXMAC__)
diff --git a/include/wx/settings.h b/include/wx/settings.h
index 30d76e853b..7858b6d68f 100644
--- a/include/wx/settings.h
+++ b/include/wx/settings.h
@@ -112,6 +112,8 @@
 #include "wx/motif/settings.h"
 #elif defined(__WXGTK__)
 #include "wx/gtk/settings.h"
+#elif defined(__WXMGL__)
+#include "wx/mgl/settings.h"
 #elif defined(__WXQT__)
 #include "wx/qt/settings.h"
 #elif defined(__WXMAC__)
diff --git a/include/wx/timer.h b/include/wx/timer.h
index 0e7c41b260..ae1da9917b 100644
--- a/include/wx/timer.h
+++ b/include/wx/timer.h
@@ -109,6 +109,8 @@ protected:
     #include "wx/motif/timer.h"
 #elif defined(__WXGTK__)
     #include "wx/gtk/timer.h"
+#elif defined(__WXMGL__)
+    #include "wx/mgl/timer.h"
 #elif defined(__WXQT__)
     #include "wx/qt/timer.h"
 #elif defined(__WXMAC__)