diff --git a/example/example.cpp b/example/example.cpp
index 9c09225..c312a7e 100644
--- a/example/example.cpp
+++ b/example/example.cpp
@@ -29,7 +29,7 @@ enum class Color : int { RED = -10, BLUE = 0, GREEN = 10 };
 template <typename E>
 auto to_integer(magic_enum::Enum<E> value) {
   // magic_enum::Enum<E> - C++17 Concept for enum type.
-  return static_cast<std::underlying_type_t<E>>(value);
+  return static_cast<magic_enum::underlying_type_t<E>>(value);
 }
 
 int main() {