diff --git a/benchmarks/tracking/options/track_reconstruction.py b/benchmarks/tracking/options/track_reconstruction.py
index b56a7dc9107e85a5ba910dc9420d8689a4ae2ace..0dc95a23665d0bc84498a14e9f3837ba40658e88 100644
--- a/benchmarks/tracking/options/track_reconstruction.py
+++ b/benchmarks/tracking/options/track_reconstruction.py
@@ -33,7 +33,7 @@ if detector_version == 'acadia':
 else:
     geo_service = GeoSvc("GeoSvc",
                          detectors=["{}/{}.xml".format(detector_path,detector_name)],
-                         materials="{}/calibrations/materials-map.cbor".format(DETECTOR_PATH),
+                         materials="{}/calibrations/materials-map.cbor".format(detector_path),
                          OutputLevel=WARNING)
 podioevent   = EICDataSvc("EventDataSvc", inputs=[input_sim_file], OutputLevel=WARNING)