diff --git a/src/ppp/nm-ppp-manager.c b/src/ppp/nm-ppp-manager.c
index e168613947..b231ff2059 100644
--- a/src/ppp/nm-ppp-manager.c
+++ b/src/ppp/nm-ppp-manager.c
@@ -438,13 +438,11 @@ impl_ppp_manager_set_ifindex (NMDBusObject *obj,
 
 	g_variant_get (parameters, "(i)", &ifindex);
 
-	_LOGD ("set-ifindex %d", (int) ifindex);
-
 	if (priv->ifindex >= 0) {
 		if (priv->ifindex == ifindex)
-			_LOGD ("ignore repeated calls setting ifindex to %d", (int) ifindex);
+			_LOGD ("set-ifindex: ignore repeated calls setting ifindex to %d", (int) ifindex);
 		else
-			_LOGW ("can't change the ifindex from %d to %d", priv->ifindex, (int) ifindex);
+			_LOGW ("set-ifindex: can't change the ifindex from %d to %d", priv->ifindex, (int) ifindex);
 		goto out;
 	}
 
@@ -457,14 +455,15 @@ impl_ppp_manager_set_ifindex (NMDBusObject *obj,
 	}
 
 	if (!plink) {
-		_LOGW ("unknown interface with ifindex %d", ifindex);
+		_LOGW ("set-ifindex: unknown interface with ifindex %d", ifindex);
 		ifindex = 0;
+	} else {
+		obj_keep_alive = nmp_object_ref (NMP_OBJECT_UP_CAST (plink));
+		_LOGD ("set-ifindex: %d, name \"%s\"", (int) ifindex, plink->name);
 	}
 
 	priv->ifindex = ifindex;
 
-	obj_keep_alive = nmp_object_ref (NMP_OBJECT_UP_CAST (plink));
-
 	g_signal_emit (self,
 	               signals[IFINDEX_SET],
 	               0,