1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/org/traccar/protocol/GatorProtocolDecoder.java b/src/main/java/org/traccar/protocol/GatorProtocolDecoder.java
index cce23288a..087861635 100644
--- a/src/main/java/org/traccar/protocol/GatorProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/GatorProtocolDecoder.java
@@ -68,7 +68,7 @@ public class GatorProtocolDecoder extends BaseProtocolDecoder {
             response.writeByte(checksum);
             response.writeByte(type);
             response.writeByte(0); // subtype
-            response.writeByte(Checksum.sum(response.nioBuffer(2, response.writerIndex())));
+            response.writeByte(Checksum.xor(response.nioBuffer(2, response.writerIndex())));
             response.writeByte(0x0D);
             channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
         }