diff --git a/include/magic_enum.hpp b/include/magic_enum.hpp
index e3b7729..09669a0 100644
--- a/include/magic_enum.hpp
+++ b/include/magic_enum.hpp
@@ -274,7 +274,7 @@ struct underlying_type<T, true> : std::underlying_type<T> {};
 } // namespace magic_enum::detail
 
 // Checks is magic_enum supported compiler.
-inline constexpr auto is_magic_enum_supported = detail::magic_enum_supported<void>::value;
+inline constexpr bool is_magic_enum_supported = detail::magic_enum_supported<void>::value;
 
 // Checks whether T is an Unscoped enumeration type.
 // Provides the member constant value which is equal to true, if T is an [Unscoped enumeration](https://en.cppreference.com/w/cpp/language/enum#Unscoped_enumeration) type. Otherwise, value is equal to false.
diff --git a/test/test.cpp b/test/test.cpp
index f556090..359767b 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -49,6 +49,8 @@ struct enum_range<number> {
 
 using namespace magic_enum;
 
+static_assert(is_magic_enum_supported, "magic_enum: Unsupported compiler (https://github.com/Neargye/magic_enum#compiler-compatibility).");
+
 TEST_CASE("enum_cast") {
   SECTION("string") {
 #if defined(_MSC_VER) && _MSC_VER < 1920