diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index 4c64daa..5ce9437 100644
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -31,6 +31,7 @@
  *
  */
 #include <linux/pagemap.h>
+#include <linux/slab.h>
 #include <linux/rbtree.h>
 #include <linux/dma-mapping.h> /* for DMA_*_DEVICE */