diff --git a/include/net/irda/irda_device.h b/include/net/irda/irda_device.h
index 3bbf695..28c690c 100644
--- a/include/net/irda/irda_device.h
+++ b/include/net/irda/irda_device.h
@@ -233,6 +233,7 @@ void irda_setup_dma(int channel, dma_addr_t buffer, int count, int mode);
 
 static inline struct irda_skb_cb *irda_get_skb_cb(struct sk_buff *skb)
 {
+	WARN_ON(skb_headroom(skb) < sizeof(struct irda_skb_cb));
 	return (struct irda_skb_cb *)(skb->data - sizeof(struct irda_skb_cb));
 }