diff --git a/COPYRIGHT.txt b/COPYRIGHT.txt
index db781f43ce..d04af2c29c 100644
--- a/COPYRIGHT.txt
+++ b/COPYRIGHT.txt
@@ -54,6 +54,7 @@ Copyright:
   Copyright 2016, Alexander Leinoff <alexander-leinoff@uiowa.edu>
   Copyright 2016, Palash Ahuja <abhor902@gmail.com>
   Copyright 2016, Yannis Mentekidis <mentekid@gmail.com>
+  Copyright 2016, Ranjan Mondal <ranjan.rev@gmail.com>
 License: BSD-3-clause
   All rights reserved.
   .
diff --git a/src/mlpack/core.hpp b/src/mlpack/core.hpp
index 6bf111f501..6e106f890e 100644
--- a/src/mlpack/core.hpp
+++ b/src/mlpack/core.hpp
@@ -189,6 +189,7 @@
  *   - Alexander Leinoff <alexander-leinoff@uiowa.edu>
  *   - Palash Ahuja <abhor902@gmail.com>
  *   - Yannis Mentekidis <mentekid@gmail.com>
+ *   - Ranjan Mondal <ranjan.rev@gmail.com>
  */
 
 // First, include all of the prerequisites.
diff --git a/src/mlpack/core/optimizers/sgd/test_function.cpp b/src/mlpack/core/optimizers/sgd/test_function.cpp
index 6edac56f35..730c0a04f6 100644
--- a/src/mlpack/core/optimizers/sgd/test_function.cpp
+++ b/src/mlpack/core/optimizers/sgd/test_function.cpp
@@ -41,7 +41,7 @@ void SGDTestFunction::Gradient(const arma::mat& coordinates,
       if (coordinates[0] >= 0)
         gradient[0] = std::exp(-coordinates[0]);
       else
-        gradient[0] = -std::exp(coordinates[1]);
+        gradient[0] = -std::exp(coordinates[0]);
       break;
 
     case 1: