diff --git a/src/mlpack/methods/ann/ffn.hpp b/src/mlpack/methods/ann/ffn.hpp
index 2c1f6828ea..0d640af751 100644
--- a/src/mlpack/methods/ann/ffn.hpp
+++ b/src/mlpack/methods/ann/ffn.hpp
@@ -522,23 +522,6 @@ class FFN
 } // namespace ann
 } // namespace mlpack
 
-//! Set the serialization version of the FFN class.  Multiple template arguments
-//! makes this ugly...
-namespace boost {
-namespace serialization {
-
-template<typename OutputLayerType,
-         typename InitializationRuleType,
-         typename... CustomLayer>
-struct version<
-    mlpack::ann::FFN<OutputLayerType, InitializationRuleType, CustomLayer...>>
-{
-  BOOST_STATIC_CONSTANT(int, value = 2);
-};
-
-} // namespace serialization
-} // namespace boost
-
 // Include implementation.
 #include "ffn_impl.hpp"
 
diff --git a/src/mlpack/methods/ann/ffn_impl.hpp b/src/mlpack/methods/ann/ffn_impl.hpp
index 17bc65bd9b..71dedf173c 100644
--- a/src/mlpack/methods/ann/ffn_impl.hpp
+++ b/src/mlpack/methods/ann/ffn_impl.hpp
@@ -23,8 +23,6 @@
 #include "visitor/set_input_height_visitor.hpp"
 #include "visitor/set_input_width_visitor.hpp"
 
-#include <boost/serialization/variant.hpp>
-
 namespace mlpack {
 namespace ann /** Artificial Neural Network. */ {