diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c
index 37be6e2..1dde91e 100644
--- a/net/rds/ib_send.c
+++ b/net/rds/ib_send.c
@@ -298,7 +298,7 @@
 		rds_ib_stats_inc(s_ib_tx_cq_event);
 
 		if (wc.wr_id == RDS_IB_ACK_WR_ID) {
-			if (ic->i_ack_queued + HZ/2 < jiffies)
+			if (time_after(jiffies, ic->i_ack_queued + HZ/2))
 				rds_ib_stats_inc(s_ib_tx_stalled);
 			rds_ib_ack_send_complete(ic);
 			continue;
@@ -315,7 +315,7 @@
 
 			rm = rds_ib_send_unmap_op(ic, send, wc.status);
 
-			if (send->s_queued + HZ/2 < jiffies)
+			if (time_after(jiffies, send->s_queued + HZ/2))
 				rds_ib_stats_inc(s_ib_tx_stalled);
 
 			if (send->s_op) {