diff --git a/include/asm-powerpc/unistd.h b/include/asm-powerpc/unistd.h
index 464a48c..b5fe932 100644
--- a/include/asm-powerpc/unistd.h
+++ b/include/asm-powerpc/unistd.h
@@ -276,7 +276,7 @@
 #define __NR_rtas		255
 #define __NR_sys_debug_setcontext 256
 /* Number 257 is reserved for vserver */
-/* 258 currently unused */
+#define __NR_migrate_pages	258
 #define __NR_mbind		259
 #define __NR_get_mempolicy	260
 #define __NR_set_mempolicy	261