diff --git a/src/mlpack/methods/ann/layer/softmin_impl.hpp b/src/mlpack/methods/ann/layer/softmin_impl.hpp
index 6082a31b2a..7693ca11dd 100644
--- a/src/mlpack/methods/ann/layer/softmin_impl.hpp
+++ b/src/mlpack/methods/ann/layer/softmin_impl.hpp
@@ -43,7 +43,7 @@ void Softmin<InputDataType, OutputDataType>::Backward(
     const arma::Mat<eT>& gy,
     arma::Mat<eT>& g)
 {
-  g = input % (arma::repmat(arma::sum(gy % input), input.n_rows, 1) - gy);
+  g = input % (gy - arma::repmat(arma::sum(gy % input), input.n_rows, 1));
 }
 
 template<typename InputDataType, typename OutputDataType>
diff --git a/src/mlpack/tests/main_tests/mean_shift_test.cpp b/src/mlpack/tests/main_tests/mean_shift_test.cpp
index eea3ceb3c7..352622a738 100644
--- a/src/mlpack/tests/main_tests/mean_shift_test.cpp
+++ b/src/mlpack/tests/main_tests/mean_shift_test.cpp
@@ -19,8 +19,8 @@ static const std::string testName = "MeanShift";
 #include <mlpack/methods/mean_shift/mean_shift_main.cpp>
 #include "test_helper.hpp"
 
-#include <boost/test/unit_test.hpp>
-#include "../test_tools.hpp"
+#include "../test_catch_tools.hpp"
+#include "catch.hpp"
 
 using namespace mlpack;