1 files changed, 2 insertions, 0 deletions
diff --git a/src/org/traccar/BaseProtocolDecoder.java b/src/org/traccar/BaseProtocolDecoder.java
index bcd441268..d150c9c80 100644
--- a/src/org/traccar/BaseProtocolDecoder.java
+++ b/src/org/traccar/BaseProtocolDecoder.java
@@ -57,12 +57,14 @@ public abstract class BaseProtocolDecoder extends OneToOneDecoder {
                 deviceId = device.getId();
                 return true;
             } else {
+                deviceId = 0;
                 if (logWarning) {
                     Log.warning("Unknown device - " + uniqueId);
                 }
                 return false;
             }
         } catch (Exception error) {
+            deviceId = 0;
             Log.warning(error);
             return false;
         }