--- util-linux-2.12r/mount/umount.c~	2007-07-04 23:57:17.000000000 +0200
+++ util-linux-2.12r/mount/umount.c	2007-07-04 23:57:31.000000000 +0200
@@ -42,7 +42,9 @@
 
 int umount2(const char *path, int flags);
 
+#ifdef _syscall2
 _syscall2(int, umount2, const char *, path, int, flags);
+#endif
 
 #else /* __NR_umount2 */