diff --git a/roles/nagios_client/files/scripts/check_datanommer_timesince.py b/roles/nagios_client/files/scripts/check_datanommer_timesince.py
index d4fcef1725..65be3ed033 100755
--- a/roles/nagios_client/files/scripts/check_datanommer_timesince.py
+++ b/roles/nagios_client/files/scripts/check_datanommer_timesince.py
@@ -25,6 +25,7 @@ def query_timesince(category):
     process = subprocess.Popen(cmd.split(), shell=False,
                                stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     stdout, stderr = process.communicate()
+    prefix, stdout = stdout.split("INFO] ", 1)
     data = json.loads(stdout)
     return float(data[0])