diff --git a/gtsam/discrete/DiscreteFactor.h b/gtsam/discrete/DiscreteFactor.h
index b22ce43d7..e2be94b94 100644
--- a/gtsam/discrete/DiscreteFactor.h
+++ b/gtsam/discrete/DiscreteFactor.h
@@ -94,6 +94,5 @@ public:
 
 // traits
 template<> struct traits<DiscreteFactor> : public Testable<DiscreteFactor> {};
-template<> struct traits<DiscreteValues> : public Testable<DiscreteValues> {};
 
 }// namespace gtsam
diff --git a/gtsam/discrete/DiscreteValues.h b/gtsam/discrete/DiscreteValues.h
index cedf9144a..a1ee22e01 100644
--- a/gtsam/discrete/DiscreteValues.h
+++ b/gtsam/discrete/DiscreteValues.h
@@ -34,4 +34,7 @@ namespace gtsam {
  */
 using DiscreteValues = Assignment<Key>;
 
+// traits
+template<> struct traits<DiscreteValues> : public Testable<DiscreteValues> {};
+
 }  // namespace gtsam