diff --git a/mods/main.go b/mods/main.go
index a6a50a0..77ba7ff 100644
--- a/mods/main.go
+++ b/mods/main.go
@@ -72,7 +72,7 @@ func initmods() {
 func dispatch(broker *tg.Broker, update tg.APIMessage) {
 	for _, mod := range mods {
 		if mod.OnMessage != nil {
-			mod.OnMessage(broker, update)
+			go mod.OnMessage(broker, update)
 		}
 	}
 }
diff --git a/mods/stt.go b/mods/stt.go
index 15ceced..6925950 100644
--- a/mods/stt.go
+++ b/mods/stt.go
@@ -32,6 +32,12 @@ func stt(broker *tg.Broker, update tg.APIMessage) {
 			update.Voice = update.ReplyTo.Voice
 		}
 
+		// Make sure it's a voice message
+		if update.Voice == nil {
+			broker.SendTextMessage(update.Chat, "Non vedo un messaggio vocale da ascoltare", &update.MessageID)
+			return
+		}
+
 		if update.Voice.Duration > 60 {
 			broker.SendTextMessage(update.Chat, "L'audio dura un bel po' (> 1 minuto), al momento non posso farci nulla :S", &update.MessageID)
 			return