diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c
index ca7ab8e..3dc69be 100644
--- a/drivers/net/mlx4/mr.c
+++ b/drivers/net/mlx4/mr.c
@@ -33,6 +33,7 @@
  */
 
 #include <linux/errno.h>
+#include <linux/slab.h>
 
 #include <linux/mlx4/cmd.h>