diff --git a/tree/dataframe/inc/LinkDef.h b/tree/dataframe/inc/LinkDef.h
index 7c13310367149..e5a4bb0675d04 100644
--- a/tree/dataframe/inc/LinkDef.h
+++ b/tree/dataframe/inc/LinkDef.h
@@ -63,6 +63,7 @@
 #pragma link C++ class TNotifyLink<ROOT::Internal::RDF::RNewSampleFlag>;
 #pragma link C++ class ROOT::RDF::RCutFlowReport;
 #pragma link C++ class ROOT::RDF::TCutInfo;
+#pragma link C++ class ROOT::Detail::RDF::RMergeableValue<ROOT::RDF::RCutFlowReport>+;
 
 #endif