diff --git a/include/dix.h b/include/dix.h
index 476559842..cf263a1f5 100644
--- a/include/dix.h
+++ b/include/dix.h
@@ -261,13 +261,10 @@ extern _X_EXPORT Bool ClientSleep(ClientPtr client,
 extern _X_EXPORT Bool ClientSignal(ClientPtr /*client */ );
 #endif                          /* ___CLIENTSIGNAL_DEFINED___ */
 
-#ifndef ___CLIENTSIGNALALL_DEFINED___
-#define ___CLIENTSIGNALALL_DEFINED___
 #define CLIENT_SIGNAL_ANY ((void *)-1)
 extern _X_EXPORT int ClientSignalAll(ClientPtr /*client*/,
                                      ClientSleepProcPtr /*function*/,
                                      void * /*closure*/);
-#endif                          /* ___CLIENTSIGNALALL_DEFINED___ */
 
 extern _X_EXPORT void ClientWakeup(ClientPtr /*client */ );