diff --git a/mi/mi.h b/mi/mi.h
index 1b47297ba..36bf8c8ce 100644
--- a/mi/mi.h
+++ b/mi/mi.h
@@ -286,6 +286,10 @@ extern _X_EXPORT void miPolylines(DrawablePtr pDrawable,
 
 /* miwindow.c */
 
+extern _X_EXPORT void miChangeBorderWidth(WindowPtr /*pWin */ ,
+                                          unsigned int  /*width */
+    );
+
 extern _X_EXPORT void miMarkUnrealizedWindow(WindowPtr /*pChild */ ,
                                              WindowPtr /*pWin */ ,
                                              Bool       /*fromConfigure */
diff --git a/mi/mi_priv.h b/mi/mi_priv.h
index 9c56cf3cb..7f1d65eaf 100644
--- a/mi/mi_priv.h
+++ b/mi/mi_priv.h
@@ -64,6 +64,5 @@ void miResizeWindow(WindowPtr pWin, int x, int y, unsigned int w,
                     unsigned int h, WindowPtr pSib);
 WindowPtr miGetLayerWindow(WindowPtr pWin);
 void miSetShape(WindowPtr pWin, int kind);
-void miChangeBorderWidth(WindowPtr pWin, unsigned int width);
 
 #endif /* _XSERVER_MI_PRIV_H */