diff --git a/hw/xfree86/modes/xf86Modes.h b/hw/xfree86/modes/xf86Modes.h
index c72a93537..89ec0d81d 100644
--- a/hw/xfree86/modes/xf86Modes.h
+++ b/hw/xfree86/modes/xf86Modes.h
@@ -98,10 +98,6 @@ xf86PruneInvalidModes(ScrnInfoPtr pScrn, DisplayModePtr *modeList,
 extern _X_EXPORT DisplayModePtr
 xf86PruneDuplicateModes(DisplayModePtr modes);
 
-extern _X_EXPORT void
-xf86ValidateModesFlags(ScrnInfoPtr pScrn, DisplayModePtr modeList,
-		       int flags);
-
 extern _X_EXPORT void
 xf86ValidateModesUserConfig(ScrnInfoPtr pScrn, DisplayModePtr modeList);