diff --git a/Detectors/ITSMFT/ITS/tracking/CMakeLists.txt b/Detectors/ITSMFT/ITS/tracking/CMakeLists.txt
index 8d8304d16764f..c9c5196da617b 100644
--- a/Detectors/ITSMFT/ITS/tracking/CMakeLists.txt
+++ b/Detectors/ITSMFT/ITS/tracking/CMakeLists.txt
@@ -52,7 +52,6 @@ o2_target_root_dictionary(ITStracking
                                   include/ITStracking/Tracklet.h
                                   include/ITStracking/Cluster.h
                                   include/ITStracking/Definitions.h
-                                  include/ITStracking/FastMultEst.h
                                   include/ITStracking/FastMultEstConfig.h
                                   include/ITStracking/TrackingConfigParam.h
                           LINKDEF src/TrackingLinkDef.h)
diff --git a/Detectors/ITSMFT/ITS/tracking/include/ITStracking/FastMultEst.h b/Detectors/ITSMFT/ITS/tracking/include/ITStracking/FastMultEst.h
index 3083a8fe9c2ec..f94c7c2034b46 100644
--- a/Detectors/ITSMFT/ITS/tracking/include/ITStracking/FastMultEst.h
+++ b/Detectors/ITSMFT/ITS/tracking/include/ITStracking/FastMultEst.h
@@ -84,8 +84,6 @@ struct FastMultEst {
     return process(countClustersOnLayer(clusters));
   }
   static bool sSeedSet;
-
-  ClassDefNV(FastMultEst, 1);
 };
 
 } // namespace o2::its
diff --git a/Detectors/ITSMFT/ITS/tracking/src/TrackingLinkDef.h b/Detectors/ITSMFT/ITS/tracking/src/TrackingLinkDef.h
index 9efd6dde0176d..0640ff98297b9 100644
--- a/Detectors/ITSMFT/ITS/tracking/src/TrackingLinkDef.h
+++ b/Detectors/ITSMFT/ITS/tracking/src/TrackingLinkDef.h
@@ -42,7 +42,6 @@
 #pragma link C++ class o2::its::ITSGpuTrackingParamConfig + ;
 #pragma link C++ class o2::conf::ConfigurableParamHelper < o2::its::ITSGpuTrackingParamConfig> + ;
 
-#pragma link C++ class o2::its::FastMultEst + ;
 #pragma link C++ class o2::its::FastMultEstConfig + ;
 #pragma link C++ class o2::conf::ConfigurableParamHelper < o2::its::FastMultEstConfig> + ;