diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 0779a23729e5..76c4ed1135f2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -265,7 +265,7 @@ void iwl3945_add_radiotap(struct iwl3945_priv *priv, struct sk_buff *skb,
 	if (skb_headroom(skb) < sizeof(*iwl3945_rt)) {
 		if (net_ratelimit())
 			printk(KERN_ERR "not enough headroom [%d] for "
-			       "radiotap head [%d]\n",
+			       "radiotap head [%zd]\n",
 			       skb_headroom(skb), sizeof(*iwl3945_rt));
 		return;
 	}