diff --git a/src/json.hpp b/src/json.hpp
index 6ea8c249..ab9b75d7 100644
--- a/src/json.hpp
+++ b/src/json.hpp
@@ -524,8 +524,7 @@ struct has_to_json
 /////////////
 
 template<typename BasicJsonType, typename T, enable_if_t<
-             std::is_same<typename std::decay<T>::type,
-                          typename BasicJsonType::boolean_t>::value, int> = 0>
+             std::is_same<T, typename BasicJsonType::boolean_t>::value, int> = 0>
 void to_json(BasicJsonType& j, T b) noexcept
 {
     external_constructor<value_t::boolean>::construct(j, b);
diff --git a/src/json.hpp.re2c b/src/json.hpp.re2c
index 72724a35..c409d18f 100644
--- a/src/json.hpp.re2c
+++ b/src/json.hpp.re2c
@@ -524,8 +524,7 @@ struct has_to_json
 /////////////
 
 template<typename BasicJsonType, typename T, enable_if_t<
-             std::is_same<typename std::decay<T>::type,
-                          typename BasicJsonType::boolean_t>::value, int> = 0>
+             std::is_same<T, typename BasicJsonType::boolean_t>::value, int> = 0>
 void to_json(BasicJsonType& j, T b) noexcept
 {
     external_constructor<value_t::boolean>::construct(j, b);