diff --git a/include/yaml-cpp/node/convert.h b/include/yaml-cpp/node/convert.h
index 292c5d3..f60bdd4 100644
--- a/include/yaml-cpp/node/convert.h
+++ b/include/yaml-cpp/node/convert.h
@@ -29,7 +29,7 @@
 namespace YAML {
 class Binary;
 struct _Null;
-template <typename T>
+template <typename T, typename Enable>
 struct convert;
 }  // namespace YAML
 
diff --git a/include/yaml-cpp/node/node.h b/include/yaml-cpp/node/node.h
index c9e9a0a..e6997c5 100644
--- a/include/yaml-cpp/node/node.h
+++ b/include/yaml-cpp/node/node.h
@@ -141,8 +141,8 @@ YAML_CPP_API bool operator==(const Node& lhs, const Node& rhs);
 
 YAML_CPP_API Node Clone(const Node& node);
 
-template <typename T>
+template <typename T, typename Enable = void>
 struct convert;
-}
+}  // namespace YAML
 
 #endif  // NODE_NODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66