diff --git a/mi/mi.h b/mi/mi.h
index b69afa862..fe6f476c4 100644
--- a/mi/mi.h
+++ b/mi/mi.h
@@ -280,9 +280,6 @@ extern _X_EXPORT void miPolylines(DrawablePtr pDrawable,
 
 /* miwindow.c */
 
-extern _X_EXPORT void miMarkWindow(WindowPtr    /*pWin */
-    );
-
 extern _X_EXPORT Bool miMarkOverlappedWindows(WindowPtr /*pWin */ ,
                                               WindowPtr /*pFirst */ ,
                                               WindowPtr *       /*ppLayerWin */
diff --git a/mi/mi_priv.h b/mi/mi_priv.h
index cab0e7967..4f303f379 100644
--- a/mi/mi_priv.h
+++ b/mi/mi_priv.h
@@ -55,5 +55,6 @@ int miValidateTree(WindowPtr pParent, WindowPtr pChild, VTKind kind);
 
 void miClearToBackground(WindowPtr pWin, int x, int y, int w, int h,
                          Bool generateExposures);
+void miMarkWindow(WindowPtr pWin);
 
 #endif /* _XSERVER_MI_PRIV_H */
diff --git a/mi/mioverlay.c b/mi/mioverlay.c
index 5e380cd7e..7aec6e513 100644
--- a/mi/mioverlay.c
+++ b/mi/mioverlay.c
@@ -4,12 +4,12 @@
 #include <X11/X.h>
 
 #include "dix/cursor_priv.h"
+#include "mi/mi_priv.h"
 
 #include "scrnintstr.h"
 #include <X11/extensions/shapeproto.h>
 #include "validate.h"
 #include "windowstr.h"
-#include "mi.h"
 #include "gcstruct.h"
 #include "regionstr.h"
 #include "privates.h"