--- mlpack-2.2.5/src/mlpack/methods/logistic_regression/logistic_regression_function.hpp	2017-08-25 17:08:44.000000000 -0700
+++ mlpack-2.2.5/src/mlpack/methods/logistic_regression/logistic_regression_function.hpp.new	2018-03-12 16:19:57.903501783 -0700
@@ -50,7 +50,7 @@
   //! Return the matrix of predictors.
   const MatType& Predictors() const { return predictors; }
   //! Return the vector of responses.
-  const arma::vec& Responses() const { return responses; }
+  const arma::Row<size_t>& Responses() const { return responses; }
 
   /**
    * Evaluate the logistic regression log-likelihood function with the given