diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 3f65c8a..d22c4c5 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -7,6 +7,7 @@
 #include <linux/bio.h>
 #include <linux/blkdev.h>
 #include <linux/bootmem.h>	/* for max_pfn/max_low_pfn */
+#include <linux/slab.h>
 
 #include "blk.h"