diff --git a/src/mlpack/core/tree/example_tree.hpp b/src/mlpack/core/tree/example_tree.hpp
index db4b9dbea3..76e48dc672 100644
--- a/src/mlpack/core/tree/example_tree.hpp
+++ b/src/mlpack/core/tree/example_tree.hpp
@@ -232,7 +232,4 @@ class ExampleTree
 }; // namespace tree
 }; // namespace mlpack
 
-//! Include implementation (which does not make any sense!).
-#include "example_tree_impl.hpp"
-
 #endif