1 files changed, 2 insertions, 2 deletions
diff --git a/src/org/traccar/protocol/CastelProtocolDecoder.java b/src/org/traccar/protocol/CastelProtocolDecoder.java
index f93b9762c..d7c6bbf46 100644
--- a/src/org/traccar/protocol/CastelProtocolDecoder.java
+++ b/src/org/traccar/protocol/CastelProtocolDecoder.java
@@ -95,7 +95,7 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
                 response.writeByte(version);
                 response.writeBytes(id);
                 response.writeShort(ChannelBuffers.swapShort(MSG_HEARTBEAT_RESPONSE));
-                response.writeShort(Checksum.crc16Ccitt(response.toByteBuffer(0, response.writerIndex())));
+                response.writeShort(Checksum.crc16(Checksum.CRC16_X25, response.toByteBuffer(0, response.writerIndex())));
                 response.writeByte(0x0D); response.writeByte(0x0A);
                 channel.write(response, remoteAddress);
             }
@@ -123,7 +123,7 @@ public class CastelProtocolDecoder extends BaseProtocolDecoder {
                     response.writeInt(0xFFFFFFFF);
                     response.writeShort(0);
                     response.writeInt((int) (System.currentTimeMillis() / 1000));
-                    response.writeShort(Checksum.crc16Ccitt(response.toByteBuffer(0, response.writerIndex())));
+                    response.writeShort(Checksum.crc16(Checksum.CRC16_X25, response.toByteBuffer(0, response.writerIndex())));
                     response.writeByte(0x0D); response.writeByte(0x0A);
                     channel.write(response, remoteAddress);
                 }