diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index ae5c0a552..77dd000ed 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -3696,8 +3696,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
     //              std::is_scalar<ScalarType>::value, int>::type = 0>
     /// @brief comparison: equal
     /// @sa https://json.nlohmann.me/api/basic_json/operator_eq/
-    template <typename T,
-              std::enable_if<detail::json_compatible_type<T, basic_json_t>::value, int>::type = 0>
+    template <typename T>
+    requires detail::json_compatible_type<T, basic_json_t>::value
     bool operator==(T rhs) const noexcept
     {
         return *this == basic_json(rhs);
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 39aebedad..bb2cbb8f3 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -22917,8 +22917,8 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
     //              std::is_scalar<ScalarType>::value, int>::type = 0>
     /// @brief comparison: equal
     /// @sa https://json.nlohmann.me/api/basic_json/operator_eq/
-    template <typename T,
-              std::enable_if<detail::json_compatible_type<T, basic_json_t>::value, int>::type = 0>
+    template <typename T>
+    requires detail::json_compatible_type<T, basic_json_t>::value
     bool operator==(T rhs) const noexcept
     {
         return *this == basic_json(rhs);