diff --git a/include/nameof.hpp b/include/nameof.hpp
index 587beb0..5895adf 100644
--- a/include/nameof.hpp
+++ b/include/nameof.hpp
@@ -266,10 +266,10 @@ inline constexpr auto nameof_type_v = n<T>();
 } // namespace nameof::detail
 
 // Checks is nameof_type supported compiler.
-inline constexpr auto is_nameof_type_supported = detail::nameof_type_supported<void>::value;
+inline constexpr bool is_nameof_type_supported = detail::nameof_type_supported<void>::value;
 
 // Checks is nameof_enum supported compiler.
-inline constexpr auto is_nameof_enum_supported = detail::nameof_enum_supported<void>::value;
+inline constexpr bool is_nameof_enum_supported = detail::nameof_enum_supported<void>::value;
 
 // Obtains simple (unqualified) string enum name of enum variable.
 template <typename E>
diff --git a/test/test.cpp b/test/test.cpp
index 78fedbb..fc9ca93 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -89,6 +89,14 @@ struct enum_range<number> {
 };
 }
 
+#if defined(__clang__) || (defined(__GNUC__) && __GNUC__ >= 9) || defined(_MSC_VER)
+static_assert(nameof::is_nameof_enum_supported, "nameof::nameof_enum: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
+#endif
+
+#if defined(__clang__) || defined(__GNUC__) || defined(_MSC_VER)
+static_assert(nameof::is_nameof_type_supported, "nameof::nameof_type: Unsupported compiler (https://github.com/Neargye/nameof#compiler-compatibility).");
+#endif
+
 SomeStruct struct_var;
 Long othervar;
 SomeStruct * ptr_s = &struct_var;