diff --git a/Framework/Core/src/RCombinedDS.cxx b/Framework/Core/src/RCombinedDS.cxx
index 0c56d967dcc05..f8ff71f8f6583 100644
--- a/Framework/Core/src/RCombinedDS.cxx
+++ b/Framework/Core/src/RCombinedDS.cxx
@@ -42,7 +42,6 @@ double loop on the entries of the two RDataSources.
 #endif
 
 #include <ROOT/TSeq.hxx>
-#include <ROOT/RMakeUnique.hxx>
 #include <ROOT/RDataFrame.hxx>
 
 #include <algorithm>