1 files changed, 2 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/PricolProtocolDecoder.java b/src/org/traccar/protocol/PricolProtocolDecoder.java
index 901639501..e0ab300be 100644
--- a/src/org/traccar/protocol/PricolProtocolDecoder.java
+++ b/src/org/traccar/protocol/PricolProtocolDecoder.java
@@ -87,7 +87,8 @@ public class PricolProtocolDecoder extends BaseProtocolDecoder {
         position.set(Position.KEY_RPM, buf.readUnsignedShort());
 
         if (channel != null) {
-            channel.write(new NetworkMessage(Unpooled.copiedBuffer("ACK", StandardCharsets.US_ASCII), remoteAddress));
+            channel.writeAndFlush(new NetworkMessage(
+                    Unpooled.copiedBuffer("ACK", StandardCharsets.US_ASCII), remoteAddress));
         }
 
         return position;