diff --git a/mi/mi.h b/mi/mi.h
index 577bd006e..97931bf25 100644
--- a/mi/mi.h
+++ b/mi/mi.h
@@ -280,11 +280,6 @@ extern _X_EXPORT void miPolylines(DrawablePtr pDrawable,
 
 /* miwindow.c */
 
-extern _X_EXPORT void miMarkUnrealizedWindow(WindowPtr /*pChild */ ,
-                                             WindowPtr /*pWin */ ,
-                                             Bool       /*fromConfigure */
-    );
-
 extern _X_EXPORT WindowPtr miSpriteTrace(SpritePtr pSprite, int x, int y);
 
 extern _X_EXPORT WindowPtr miXYToWindow(ScreenPtr pScreen, SpritePtr pSprite, int x, int y);
diff --git a/mi/mi_priv.h b/mi/mi_priv.h
index 69b7a1fae..b81185845 100644
--- a/mi/mi_priv.h
+++ b/mi/mi_priv.h
@@ -66,5 +66,6 @@ void miResizeWindow(WindowPtr pWin, int x, int y, unsigned int w,
 WindowPtr miGetLayerWindow(WindowPtr pWin);
 void miSetShape(WindowPtr pWin, int kind);
 void miChangeBorderWidth(WindowPtr pWin, unsigned int width);
+void miMarkUnrealizedWindow(WindowPtr pChild, WindowPtr pWin, Bool fromConfigure);
 
 #endif /* _XSERVER_MI_PRIV_H */