diff --git a/hw/dmx/dmx.c b/hw/dmx/dmx.c
index 10d9e2206..56e5bb64a 100644
--- a/hw/dmx/dmx.c
+++ b/hw/dmx/dmx.c
@@ -51,7 +51,6 @@
 #include "misc.h"
 #include "os.h"
 #include "dixstruct.h"
-#define EXTENSION_PROC_ARGS void *
 #include "extnsionst.h"
 #include "opaque.h"
 
diff --git a/hw/dmx/input/dmxeq.c b/hw/dmx/input/dmxeq.c
index 86ba960b8..33e8771c9 100644
--- a/hw/dmx/input/dmxeq.c
+++ b/hw/dmx/input/dmxeq.c
@@ -80,7 +80,6 @@
 #include "scrnintstr.h"         /* For screenInfo */
 
 #include <X11/extensions/XIproto.h>
-#define EXTENSION_PROC_ARGS void *
 
 #if DMX_EQ_DEBUG
 #define DMXDBG2(f,a,b)           dmxLog(dmxDebug,f,a,b)
diff --git a/hw/dmx/input/dmxinputinit.c b/hw/dmx/input/dmxinputinit.c
index 9a14044db..29895c7f7 100644
--- a/hw/dmx/input/dmxinputinit.c
+++ b/hw/dmx/input/dmxinputinit.c
@@ -76,7 +76,6 @@
 #include <X11/extensions/XI.h>
 #include <X11/extensions/XIproto.h>
 #include "exevents.h"
-#define EXTENSION_PROC_ARGS void *
 #include "extinit.h"
 
 /* From XI.h */
diff --git a/hw/xfree86/common/xf86Xinput.c b/hw/xfree86/common/xf86Xinput.c
index df1ecb913..dcec4236e 100644
--- a/hw/xfree86/common/xf86Xinput.c
+++ b/hw/xfree86/common/xf86Xinput.c
@@ -74,7 +74,6 @@
 #include "exevents.h"	/* AddInputDevice */
 #include "exglobals.h"
 
-#define EXTENSION_PROC_ARGS void *
 #include "extnsionst.h"
 
 #include "windowstr.h"	/* screenIsSaved */