diff --git a/tree/dataframe/inc/ROOT/RDFNodes.hxx b/tree/dataframe/inc/ROOT/RDFNodes.hxx
index 2ba68f27834e98406b40b9f66af60729e2044200..2dfa0ef97e78cb508d876e763872845116d5b78d 100644
--- a/tree/dataframe/inc/ROOT/RDFNodes.hxx
+++ b/tree/dataframe/inc/ROOT/RDFNodes.hxx
@@ -37,14 +37,6 @@
 #include <vector>
 
 namespace ROOT {
-namespace RDF{
-template <typename Proxied, typename DataSource>
-class RInterface;
-template <typename T>
-class RResultPtr;
-
-}// Namespace RDF
-
 namespace Internal {
 namespace RDF {
 // forward declarations for RLoopManager