diff --git a/hw/xwayland/xwayland.c b/hw/xwayland/xwayland.c
index 0ba93a247..5e508d25d 100644
--- a/hw/xwayland/xwayland.c
+++ b/hw/xwayland/xwayland.c
@@ -45,6 +45,8 @@
 #include <propertyst.h>
 #include <version-config.h>
 
+#include "os/osdep.h"
+
 #include "xwayland-screen.h"
 #include "xwayland-vidmode.h"
 
diff --git a/include/os.h b/include/os.h
index 9ba569ae6..a69f127c1 100644
--- a/include/os.h
+++ b/include/os.h
@@ -158,10 +158,6 @@ extern _X_EXPORT void ListenOnOpenFD(int /* fd */ , int /* noxauth */ );
 
 extern _X_EXPORT Bool AddClientOnOpenFD(int /* fd */ );
 
-#ifdef MONOTONIC_CLOCK
-extern void ForceClockId(clockid_t /* forced_clockid */);
-#endif
-
 extern _X_EXPORT CARD32 GetTimeInMillis(void);
 extern _X_EXPORT CARD64 GetTimeInMicros(void);
 
diff --git a/os/osdep.h b/os/osdep.h
index 2687f0ee9..dc494d175 100644
--- a/os/osdep.h
+++ b/os/osdep.h
@@ -249,4 +249,7 @@ int OnlyListenToOneClient(ClientPtr client);
 
 void ListenToAllClients(void);
 
+/* allow DDX to force using another clock */
+void ForceClockId(clockid_t forced_clockid);
+
 #endif                          /* _OSDEP_H_ */