diff --git a/include/os.h b/include/os.h
index ccd77afb8..e87d6d9b6 100644
--- a/include/os.h
+++ b/include/os.h
@@ -86,8 +86,6 @@ typedef struct _NewClientRec *NewClientPtr;
 #include <stdio.h>
 #include <stdarg.h>
 
-extern _X_EXPORT Bool WaitForSomething(Bool clients_are_ready);
-
 extern _X_EXPORT int ReadRequestFromClient(ClientPtr /*client */ );
 
 extern _X_EXPORT int WriteFdToClient(ClientPtr client, int fd, Bool do_close);
diff --git a/os/osdep.h b/os/osdep.h
index 321642585..fdcb083b9 100644
--- a/os/osdep.h
+++ b/os/osdep.h
@@ -200,6 +200,8 @@ void ListenToAllClients(void);
 /* allow DDX to force using another clock */
 void ForceClockId(clockid_t forced_clockid);
 
+Bool WaitForSomething(Bool clients_are_ready);
+
 extern int LimitClients;
 extern Bool PartialNetwork;
 extern Bool RunFromSigStopParent;