diff --git a/fastlib/branches/fastlib-stl/mlpack/allnn/allnn.h b/fastlib/branches/fastlib-stl/mlpack/allnn/allnn.h
index a88c7253e8..bde88004d5 100644
--- a/fastlib/branches/fastlib-stl/mlpack/allnn/allnn.h
+++ b/fastlib/branches/fastlib-stl/mlpack/allnn/allnn.h
@@ -220,12 +220,6 @@ class AllNN {
  private:
   // Helper functions
 
-  /**
-   * Internal function to build the trees for computation.  It won't build trees
-   * if naive_ = false.
-   */
-  void BuildTrees();
-
   /**
    * Computes the minimum squared distance between the bounding boxes
    * of two nodes.