diff --git a/glamor/glamor.h b/glamor/glamor.h
index a12d3294d..84035e88b 100644
--- a/glamor/glamor.h
+++ b/glamor/glamor.h
@@ -318,7 +318,6 @@ extern _X_EXPORT void glamor_validate_gc(GCPtr gc, unsigned long changes,
 
 #define HAS_GLAMOR_DESTROY_GC 1
 
-extern Bool _X_EXPORT glamor_change_window_attributes(WindowPtr pWin, unsigned long mask);
 extern void _X_EXPORT glamor_copy_window(WindowPtr window, DDXPointRec old_origin, RegionPtr src_region);
 
 extern _X_EXPORT void glamor_finish(ScreenPtr screen);
diff --git a/glamor/glamor_priv.h b/glamor/glamor_priv.h
index 5512f0cb7..eed2ee06e 100644
--- a/glamor/glamor_priv.h
+++ b/glamor/glamor_priv.h
@@ -1057,6 +1057,8 @@ Bool glamor_get_drawable_modifiers(DrawablePtr draw,
 void glamor_egl_screen_init(ScreenPtr screen,
                             struct glamor_context *glamor_ctx);
 
+Bool glamor_change_window_attributes(WindowPtr pWin, unsigned long mask);
+
 #include "glamor_utils.h"
 
 #if 0