diff --git a/drivers/net/wireless/libertas/rx.c b/drivers/net/wireless/libertas/rx.c
index bd845d09f174..65f02cc6752f 100644
--- a/drivers/net/wireless/libertas/rx.c
+++ b/drivers/net/wireless/libertas/rx.c
@@ -182,8 +182,8 @@ int lbs_process_rxed_packet(struct lbs_private *priv, struct sk_buff *skb)
 	}
 
 	lbs_deb_rx("rx data: skb->len - pkt_ptr = %d-%zd = %zd\n",
-		skb->len, le32_to_cpu(p_rx_pd->pkt_ptr),
-		skb->len - le32_to_cpu(p_rx_pd->pkt_ptr));
+		skb->len, (size_t)le32_to_cpu(p_rx_pd->pkt_ptr),
+		skb->len - (size_t)le32_to_cpu(p_rx_pd->pkt_ptr));
 
 	lbs_deb_hex(LBS_DEB_RX, "RX Data: Dest", p_rx_pkt->eth803_hdr.dest_addr,
 		sizeof(p_rx_pkt->eth803_hdr.dest_addr));