diff --git a/hw/xquartz/xpr/dri.h b/hw/xquartz/xpr/dri.h
index 7d1c4f212..8717a5186 100644
--- a/hw/xquartz/xpr/dri.h
+++ b/hw/xquartz/xpr/dri.h
@@ -72,6 +72,9 @@ DRIFinishScreenInit(ScreenPtr pScreen);
 extern void
 DRICloseScreen(ScreenPtr pScreen);
 
+extern Bool
+DRIExtensionInit(void);
+
 extern void
 DRIReset(void);