diff --git a/mi/mi.h b/mi/mi.h
index 89870d523..882ebb41a 100644
--- a/mi/mi.h
+++ b/mi/mi.h
@@ -258,11 +258,6 @@ extern _X_EXPORT Bool miScreenInit(ScreenPtr pScreen,
 
 /* mivaltree.c */
 
-extern _X_EXPORT int miValidateTree(WindowPtr /*pParent */ ,
-                                    WindowPtr /*pChild */ ,
-                                    VTKind      /*kind */
-    );
-
 extern _X_EXPORT void miWideLine(DrawablePtr /*pDrawable */ ,
                                  GCPtr /*pGC */ ,
                                  int /*mode */ ,
diff --git a/mi/mi_priv.h b/mi/mi_priv.h
index 865fe2b56..1c15462c9 100644
--- a/mi/mi_priv.h
+++ b/mi/mi_priv.h
@@ -51,5 +51,6 @@ void miSourceValidate(DrawablePtr pDrawable, int x, int y, int w, int h,
 Bool miCreateScreenResources(ScreenPtr pScreen);
 int miShapedWindowIn(RegionPtr universe, RegionPtr bounding, BoxPtr rect,
                      int x, int y);
+int miValidateTree(WindowPtr pParent, WindowPtr pChild, VTKind kind);
 
 #endif /* _XSERVER_MI_PRIV_H */