diff --git a/src/mlpack/methods/neighbor_search/allkfn_main.cpp b/src/mlpack/methods/neighbor_search/allkfn_main.cpp
index b384abb5df..8f7e1dc11a 100644
--- a/src/mlpack/methods/neighbor_search/allkfn_main.cpp
+++ b/src/mlpack/methods/neighbor_search/allkfn_main.cpp
@@ -59,7 +59,6 @@ int main(int argc, char *argv[])
 
   // Get all the parameters.
   string referenceFile = CLI::GetParam<string>("reference_file");
-  string outputFile = CLI::GetParam<string>("output_file");
 
   string distancesFile = CLI::GetParam<string>("distances_file");
   string neighborsFile = CLI::GetParam<string>("neighbors_file");
diff --git a/src/mlpack/methods/neighbor_search/allknn_main.cpp b/src/mlpack/methods/neighbor_search/allknn_main.cpp
index 70c6d03406..2c449b6c03 100644
--- a/src/mlpack/methods/neighbor_search/allknn_main.cpp
+++ b/src/mlpack/methods/neighbor_search/allknn_main.cpp
@@ -60,7 +60,6 @@ int main(int argc, char *argv[])
 
   // Get all the parameters.
   string referenceFile = CLI::GetParam<string>("reference_file");
-  string outputFile = CLI::GetParam<string>("output_file");
 
   string distancesFile = CLI::GetParam<string>("distances_file");
   string neighborsFile = CLI::GetParam<string>("neighbors_file");