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-rw-r--r--src/org/traccar/protocol/NavigilProtocolDecoder.java2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/NavigilProtocolDecoder.java b/src/org/traccar/protocol/NavigilProtocolDecoder.java
index 3e116486f..58ea6e577 100644
--- a/src/org/traccar/protocol/NavigilProtocolDecoder.java
+++ b/src/org/traccar/protocol/NavigilProtocolDecoder.java
@@ -63,7 +63,7 @@ public class NavigilProtocolDecoder extends BaseProtocolDecoder {
data.writeShort(0); // OK
ChannelBuffer header = ChannelBuffers.directBuffer(ByteOrder.LITTLE_ENDIAN, 20);
- header.writeByte(1); header.writeByte(1);
+ header.writeByte(1); header.writeByte(0);
header.writeShort(senderSequenceNumber++);
header.writeShort(MESSAGE_ACKNOWLEDGEMENT);
header.writeShort(header.capacity() + data.capacity());