diff --git a/src/mlpack/methods/amf/init_rules/average_init.hpp b/src/mlpack/methods/amf/init_rules/average_init.hpp
index 1cf711c35f..3379c9808d 100644
--- a/src/mlpack/methods/amf/init_rules/average_init.hpp
+++ b/src/mlpack/methods/amf/init_rules/average_init.hpp
@@ -68,6 +68,10 @@ class AverageInitialization
     W = W + avgV;
     H = H + avgV;
   }
+
+  //! Serialize the object (in this case, there is nothing to do).
+  template<typename Archive>
+  void Serialize(Archive& /* ar */, const unsigned int /* version */) { }
 };
 
 } // namespace amf
diff --git a/src/mlpack/methods/amf/init_rules/random_acol_init.hpp b/src/mlpack/methods/amf/init_rules/random_acol_init.hpp
index 3bf9ad3d44..9f9465adf9 100644
--- a/src/mlpack/methods/amf/init_rules/random_acol_init.hpp
+++ b/src/mlpack/methods/amf/init_rules/random_acol_init.hpp
@@ -76,6 +76,10 @@ class RandomAcolInitialization
     // Initialize H to random values.
     H.randu(r, m);
   }
+
+  //! Serialize the object (in this case, there is nothing to serialize).
+  template<typename Archive>
+  void Serialize(Archive& /* ar */, const unsigned int /* version */) { }
 };
 
 } // namespace amf
diff --git a/src/mlpack/methods/amf/init_rules/random_init.hpp b/src/mlpack/methods/amf/init_rules/random_init.hpp
index 2a5b45fc98..f9cd7c20a5 100644
--- a/src/mlpack/methods/amf/init_rules/random_init.hpp
+++ b/src/mlpack/methods/amf/init_rules/random_init.hpp
@@ -45,6 +45,10 @@ class RandomInitialization
     W.randu(n, r);
     H.randu(r, m);
   }
+
+  //! Serialize the object (in this case, there is nothing to serialize).
+  template<typename Archive>
+  void Serialize(Archive& /* ar */, const unsigned int /* version */) { }
 };
 
 } // namespace amf