diff --git a/common/python/nomadcore/parser_backend.py b/common/python/nomadcore/parser_backend.py
index ab8f3d80157d295860fe679a0fb327aa2a14591e..86dbe37e0fb125c8e86f58826199285ecc2c8da0 100644
--- a/common/python/nomadcore/parser_backend.py
+++ b/common/python/nomadcore/parser_backend.py
@@ -246,7 +246,7 @@ class JsonParseEventsWriterBackend(object):
             'matcherName': match_telemetry['matcherName'],
             'matchFlags': match_telemetry['matchFlags'],
             'flatValues': match_telemetry['span_flat'],
-            'group': match_telemetry['group'],
+            'matcherGroup': match_telemetry['matcherGroup'],
         }
         self.__jsonOutput(res)