diff --git a/src/include/ipxe/netdevice.h b/src/include/ipxe/netdevice.h
index f20a81f7..a1d207ff 100644
--- a/src/include/ipxe/netdevice.h
+++ b/src/include/ipxe/netdevice.h
@@ -430,6 +430,14 @@ struct net_device {
 /** Network device receive queue processing is frozen */
 #define NETDEV_RX_FROZEN 0x0004
 
+/** Network device interrupts are unsupported
+ *
+ * This flag can be used by a network device to indicate that
+ * interrupts are not supported despite the presence of an irq()
+ * method.
+ */
+#define NETDEV_IRQ_UNSUPPORTED 0x0008
+
 /** Link-layer protocol table */
 #define LL_PROTOCOLS __table ( struct ll_protocol, "ll_protocols" )
 
@@ -646,7 +654,8 @@ netdev_is_open ( struct net_device *netdev ) {
  */
 static inline __attribute__ (( always_inline )) int
 netdev_irq_supported ( struct net_device *netdev ) {
-	return ( netdev->op->irq != NULL );
+	return ( ( netdev->op->irq != NULL ) &&
+		 ! ( netdev->state & NETDEV_IRQ_UNSUPPORTED ) );
 }
 
 /**
diff --git a/src/net/80211/net80211.c b/src/net/80211/net80211.c
index 00794592..d4970ad5 100644
--- a/src/net/80211/net80211.c
+++ b/src/net/80211/net80211.c
@@ -805,6 +805,10 @@ int net80211_register ( struct net80211_device *dev,
 		 NET80211_MAX_CHANNELS * sizeof ( dev->channels[0] ) );
 	dev->channel = 0;
 
+	/* Mark device as not supporting interrupts, if applicable */
+	if ( ! ops->irq )
+		dev->netdev->state |= NETDEV_IRQ_UNSUPPORTED;
+
 	list_add_tail ( &dev->list, &net80211_devices );
 	return register_netdev ( dev->netdev );
 }
diff --git a/src/net/vlan.c b/src/net/vlan.c
index 49e3257a..f515c2dc 100644
--- a/src/net/vlan.c
+++ b/src/net/vlan.c
@@ -389,6 +389,10 @@ int vlan_create ( struct net_device *trunk, unsigned int tag,
 	snprintf ( netdev->name, sizeof ( netdev->name ), "%s-%d",
 		   trunk->name, vlan->tag );
 
+	/* Mark device as not supporting interrupts, if applicable */
+	if ( ! netdev_irq_supported ( trunk ) )
+		netdev->state |= NETDEV_IRQ_UNSUPPORTED;
+
 	/* Register VLAN device */
 	if ( ( rc = register_netdev ( netdev ) ) != 0 ) {
 		DBGC ( netdev, "VLAN %s could not register: %s\n",