From 4c90a1c3c5e7df137f23b866247dd271b561419f Mon Sep 17 00:00:00 2001
From: Jan Fiete <jgrosseo@cern.ch>
Date: Thu, 4 Nov 2021 15:15:46 +0100
Subject: [PATCH 1/2] adding extern declaration

---
 Framework/Core/include/Framework/AnalysisDataModel.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Framework/Core/include/Framework/AnalysisDataModel.h b/Framework/Core/include/Framework/AnalysisDataModel.h
index 14a37d7eba703..851f79de5377a 100644
--- a/Framework/Core/include/Framework/AnalysisDataModel.h
+++ b/Framework/Core/include/Framework/AnalysisDataModel.h
@@ -336,6 +336,7 @@ using TrackExtra = TracksExtra::iterator;
 } // namespace aod
 namespace soa
 {
+extern template struct soa::Join<aod::Tracks, aod::TracksExtra>;
 extern template struct soa::Join<aod::Tracks, aod::TracksCov, aod::TracksExtra>;
 extern template struct soa::Join<aod::TracksExtension, aod::StoredTracks>;
 } // namespace soa

From ada079b9cc7ce2d85ee3feca8a7a9a3ad04c0ae9 Mon Sep 17 00:00:00 2001
From: Jan Fiete <jgrosseo@cern.ch>
Date: Thu, 4 Nov 2021 16:35:31 +0100
Subject: [PATCH 2/2] fix

---
 Framework/Core/src/AnalysisDataModel.cxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Framework/Core/src/AnalysisDataModel.cxx b/Framework/Core/src/AnalysisDataModel.cxx
index d986486d94c69..5a12a16d6880c 100644
--- a/Framework/Core/src/AnalysisDataModel.cxx
+++ b/Framework/Core/src/AnalysisDataModel.cxx
@@ -13,6 +13,7 @@
 namespace o2::soa
 {
 template struct Join<aod::BCs, aod::Timestamps>;
+template struct Join<aod::Tracks, aod::TracksExtra>;
 template struct Join<aod::Tracks, aod::TracksCov, aod::TracksExtra>;
 template struct Join<aod::FwdTracks, aod::FwdTracksCov>;
 template struct Join<aod::TransientV0s, aod::StoredV0s>;