diff --git a/tree/dataframe/inc/ROOT/RDF/InterfaceUtils.hxx b/tree/dataframe/inc/ROOT/RDF/InterfaceUtils.hxx
index 0904f2a0c6f15..373c526496058 100644
--- a/tree/dataframe/inc/ROOT/RDF/InterfaceUtils.hxx
+++ b/tree/dataframe/inc/ROOT/RDF/InterfaceUtils.hxx
@@ -813,10 +813,7 @@ AddSizeBranches(const std::vector<std::string> &branches, ROOT::RDF::RDataSource
                 std::vector<std::string> &&colsWithoutAliases, std::vector<std::string> &&colsWithAliases);
 
 void RemoveDuplicates(ColumnNames_t &columnNames);
-
-#ifdef R__HAS_ROOT7
 void RemoveRNTupleSubFields(ColumnNames_t &columnNames);
-#endif
 
 } // namespace RDF
 } // namespace Internal
diff --git a/tree/dataframe/inc/ROOT/RDF/RLoopManager.hxx b/tree/dataframe/inc/ROOT/RDF/RLoopManager.hxx
index ea972b78ca85d..12eeef517592c 100644
--- a/tree/dataframe/inc/ROOT/RDF/RLoopManager.hxx
+++ b/tree/dataframe/inc/ROOT/RDF/RLoopManager.hxx
@@ -351,7 +351,6 @@ std::shared_ptr<ROOT::Detail::RDF::RLoopManager>
 CreateLMFromTTree(std::string_view datasetName, const std::vector<std::string> &fileNameGlobs,
                   const std::vector<std::string> &defaultColumns, bool checkFile = true);
 
-#ifdef R__HAS_ROOT7
 /// \brief Create an RLoopManager that reads an RNTuple.
 /// \param[in] datasetName Name of the RNTuple
 /// \param[in] fileNameGlob File name (or glob) in which the RNTuple is stored.
@@ -393,7 +392,6 @@ std::shared_ptr<ROOT::Detail::RDF::RLoopManager> CreateLMFromFile(std::string_vi
 std::shared_ptr<ROOT::Detail::RDF::RLoopManager> CreateLMFromFile(std::string_view datasetName,
                                                                   const std::vector<std::string> &fileNameGlobs,
                                                                   const std::vector<std::string> &defaultColumns);
-#endif
 
 } // namespace RDF
 } // namespace Detail
diff --git a/tree/dataframe/test/dataframe_snapshot_emptyoutput.cxx b/tree/dataframe/test/dataframe_snapshot_emptyoutput.cxx
index 3bdfd30388a12..14dfd5c508cc2 100644
--- a/tree/dataframe/test/dataframe_snapshot_emptyoutput.cxx
+++ b/tree/dataframe/test/dataframe_snapshot_emptyoutput.cxx
@@ -6,6 +6,8 @@
 
 #include <ROOT/RDataFrame.hxx>
 
+#include <thread>
+
 class RDFManyBranchTypesTTree : public ::testing::TestWithParam<std::pair<bool, bool>> {
 protected:
    inline constexpr static auto fgNEvents = 10u;