diff --git a/dix/dix_priv.h b/dix/dix_priv.h
index 1f8c83688..0f9078eda 100644
--- a/dix/dix_priv.h
+++ b/dix/dix_priv.h
@@ -321,4 +321,14 @@ ClientPtr NextAvailableClient(void *ospriv);
 void MarkClientException(ClientPtr pClient)
     _X_ATTRIBUTE_NONNULL_ARG(1);
 
+/*
+ * @brief put a client to sleep
+ *
+ * @param pClient   the client to put into sleep
+ * @param func  called when client wakes up
+ * @param closure   data passed to the callback function
+ */
+Bool ClientSleep(ClientPtr pClient, ClientSleepProcPtr func, void *closure)
+    _X_ATTRIBUTE_NONNULL_ARG(1,2);
+
 #endif /* _XSERVER_DIX_PRIV_H */
diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index 4ac0e144e..86be22db7 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -36,6 +36,7 @@
 
 #include <errno.h>
 
+#include "dix/dix_priv.h"
 #include "os/client_priv.h"
 
 #ifdef WITH_LIBDRM
diff --git a/include/dix.h b/include/dix.h
index fe67bd0af..179f16d26 100644
--- a/include/dix.h
+++ b/include/dix.h
@@ -219,10 +219,6 @@ extern _X_EXPORT Bool QueueWorkProc(Bool (*function)(ClientPtr clientUnused,
 typedef Bool (*ClientSleepProcPtr) (ClientPtr client,
                                     void *closure);
 
-extern _X_EXPORT Bool ClientSleep(ClientPtr client,
-                                  ClientSleepProcPtr function,
-                                  void *closure);
-
 #ifndef ___CLIENTSIGNAL_DEFINED___
 #define ___CLIENTSIGNAL_DEFINED___
 extern _X_EXPORT Bool ClientSignal(ClientPtr /*client */ );