diff --git a/sys/contrib/rdma/krping/krping.c b/sys/contrib/rdma/krping/krping.c
index 8b32fe31f4cb..c734da36247f 100644
--- a/sys/contrib/rdma/krping/krping.c
+++ b/sys/contrib/rdma/krping/krping.c
@@ -736,7 +736,7 @@ static u32 krping_rdma_rkey(struct krping_cb *cb, u64 buf, int post_inv)
 		post_inv,
 		cb->reg_mr_wr.key,
 		cb->reg_mr->page_size,
-		cb->reg_mr->length,
+		(unsigned)cb->reg_mr->length,
 	        (unsigned long long)cb->reg_mr->iova);
 
 	if (post_inv)
diff --git a/sys/ofed/include/rdma/ib_verbs.h b/sys/ofed/include/rdma/ib_verbs.h
index e7b99c3a8a60..fcf791e9175b 100644
--- a/sys/ofed/include/rdma/ib_verbs.h
+++ b/sys/ofed/include/rdma/ib_verbs.h
@@ -1559,7 +1559,7 @@ struct ib_mr {
 	u32		   lkey;
 	u32		   rkey;
 	u64		   iova;
-	u32		   length;
+	u64		   length;
 	unsigned int	   page_size;
 	bool		   need_inval;
 	union {