1 files changed, 2 insertions, 1 deletions
diff --git a/src/org/traccar/protocol/SuntechProtocolDecoder.java b/src/org/traccar/protocol/SuntechProtocolDecoder.java
index dc1f2f274..f21f6e0a0 100644
--- a/src/org/traccar/protocol/SuntechProtocolDecoder.java
+++ b/src/org/traccar/protocol/SuntechProtocolDecoder.java
@@ -24,6 +24,7 @@ import org.jboss.netty.channel.Channel;
 import org.jboss.netty.channel.ChannelHandlerContext;
 
 import org.traccar.BaseProtocolDecoder;
+import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Event;
 import org.traccar.model.Position;
 
@@ -95,7 +96,7 @@ public class SuntechProtocolDecoder extends BaseProtocolDecoder {
         position.setValid(true); // wrong?
 
         // Speed
-        position.setSpeed(Double.valueOf(parser.group(index++)) * 0.539957);
+        position.setSpeed(UnitsConverter.knotsFromKph(Double.valueOf(parser.group(index++))));
 
         // Course
         position.setCourse(Double.valueOf(parser.group(index++)));