diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index b4ba41e..e2766d8 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -18,6 +18,7 @@
  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/blkdev.h>
 #include <linux/seq_file.h>