diff --git a/parser/src/main/java/org/dna/mqtt/moquette/messaging/spi/impl/SimpleMessaging.java b/parser/src/main/java/org/dna/mqtt/moquette/messaging/spi/impl/SimpleMessaging.java
index c3f2a122..0bd9fe9d 100644
--- a/parser/src/main/java/org/dna/mqtt/moquette/messaging/spi/impl/SimpleMessaging.java
+++ b/parser/src/main/java/org/dna/mqtt/moquette/messaging/spi/impl/SimpleMessaging.java
@@ -402,7 +402,6 @@ public class SimpleMessaging implements IMessaging, EventHandler<ValueEvent> {
         //TODO by now it handles only QoS 0 messages
         for (int i = 0; i < msg.subscriptions().size(); i++) {
             ackMessage.addType(QOSType.MOST_ONE);
-            ackMessage.addType(QOSType.LEAST_ONE);
         }
         LOG.info("replying with SubAct to MSG ID " + msg.getMessageID());
         session.write(ackMessage);