diff --git a/src/nm-device-ethernet.c b/src/nm-device-ethernet.c
index c64ebb8ed6..69d0539dc5 100644
--- a/src/nm-device-ethernet.c
+++ b/src/nm-device-ethernet.c
@@ -311,6 +311,9 @@ constructor (GType type,
 	self = NM_DEVICE (object);
 	priv = NM_DEVICE_ETHERNET_GET_PRIVATE (self);
 
+	nm_log_dbg (LOGD_HW | LOGD_ETHER, "(%s): kernel interface #%d",
+	            nm_device_get_iface (NM_DEVICE (self)), priv->ifindex);
+
 	caps = nm_device_get_capabilities (self);
 	if (caps & NM_DEVICE_CAP_CARRIER_DETECT) {
 		GError *error = NULL;
diff --git a/src/nm-device-olpc-mesh.c b/src/nm-device-olpc-mesh.c
index 41fc83acd7..2093a8e887 100644
--- a/src/nm-device-olpc-mesh.c
+++ b/src/nm-device-olpc-mesh.c
@@ -262,6 +262,9 @@ constructor (GType type,
 	self = NM_DEVICE_OLPC_MESH (object);
 	priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self);
 
+	nm_log_dbg (LOGD_HW | LOGD_OLPC_MESH, "(%s): kernel ifindex %d",
+	            nm_device_get_iface (NM_DEVICE (self)), priv->ifindex);
+
 	iface = nm_device_get_iface (NM_DEVICE (self));
 	fd = socket (PF_INET, SOCK_DGRAM, 0);
 	if (fd < 0)
diff --git a/src/nm-device-wifi.c b/src/nm-device-wifi.c
index 6062c3c72e..3e7a820476 100644
--- a/src/nm-device-wifi.c
+++ b/src/nm-device-wifi.c
@@ -578,6 +578,9 @@ constructor (GType type,
 	self = NM_DEVICE_WIFI (object);
 	priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
 
+	nm_log_dbg (LOGD_HW | LOGD_WIFI, "(%s): kernel ifindex %d",
+	            nm_device_get_iface (NM_DEVICE (self)), priv->ifindex);
+
 	memset (&range, 0, sizeof (struct iw_range));
 	success = wireless_get_range (NM_DEVICE_WIFI (object), &range, &response_len);
 	if (!success)