diff --git a/src/preprocess.py b/src/preprocess.py
index a37e60d..5b352cf 100644
--- a/src/preprocess.py
+++ b/src/preprocess.py
@@ -122,7 +122,7 @@ def mqttOnMessageCallback(client, userdata, message):
                 }
             case 'LMDS200':
                 if f_port != 2:
-                    raise JustIgnore()
+                    raise JustIgnoreMessage()
                 battery = struct.unpack('>H', frame[0:2])[0]
                 distance1 = struct.unpack('>H', frame[2:4])[0]
                 distance2 = struct.unpack('>H', frame[4:6])[0]
@@ -147,7 +147,7 @@ def mqttOnMessageCallback(client, userdata, message):
 
         logger.debug(f"{measurement=}")
         dbh.storeMeasurement(measurement)
-    except JustIgnore:
+    except JustIgnoreMessage:
         pass
     except SensorTypeNotFoundException as e:
         logger.error(f"application has unknown sensor type {e.sensorType}")