1 files changed, 1 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/FlextrackProtocolDecoder.java b/src/org/traccar/protocol/FlextrackProtocolDecoder.java
index f2a5579d2..a6970ba86 100644
--- a/src/org/traccar/protocol/FlextrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/FlextrackProtocolDecoder.java
@@ -68,7 +68,7 @@ public class FlextrackProtocolDecoder extends BaseProtocolDecoder {
 
     private void sendAcknowledgement(Channel channel, SocketAddress remoteAddress, String index) {
         if (channel != null) {
-            channel.write(new NetworkMessage(index + ",ACK\r", remoteAddress));
+            channel.writeAndFlush(new NetworkMessage(index + ",ACK\r", remoteAddress));
         }
     }