diff --git a/include/os.h b/include/os.h
index f5beb6a94..709f3e02c 100644
--- a/include/os.h
+++ b/include/os.h
@@ -326,9 +326,6 @@ GetClientFd(ClientPtr);
 extern _X_EXPORT Bool
 ClientIsLocal(ClientPtr client);
 
-extern _X_EXPORT void
-AccessUsingXdmcp(void);
-
 extern _X_EXPORT int
 ddxProcessArgument(int /*argc */ , char * /*argv */ [], int /*i */ );
 
diff --git a/os/auth.h b/os/auth.h
index a05198f05..e03144f11 100644
--- a/os/auth.h
+++ b/os/auth.h
@@ -109,4 +109,6 @@ void AugmentSelf(void *from, int len);
 
 int ChangeAccessControl(ClientPtr client, int fEnabled);
 
+void AccessUsingXdmcp(void);
+
 #endif /* _XSERVER_OS_AUTH_H */