diff --git a/hw/xfree86/ddc/edid.h b/hw/xfree86/ddc/edid.h
index f9bb6f9a28..1e53b56a5a 100644
--- a/hw/xfree86/ddc/edid.h
+++ b/hw/xfree86/ddc/edid.h
@@ -325,8 +325,6 @@
 #define IS_RIGHT_STEREO(x) (x & 0x01)
 #define IS_LEFT_STEREO(x) (x & 0x02)
 #define IS_4WAY_STEREO(x) (x & 0x03)
-#define IS_RIGHT_ON_SYNC(x) IS_RIGHT_STEREO(x)
-#define IS_LEFT_ON_SYNC(x) IS_LEFT_STEREO(x)
 
 struct vendor {
     char name[4];