diff --git a/include/fmt/core.h b/include/fmt/core.h
index ad037f8b..790ba42a 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -585,7 +585,7 @@ struct error_handler {
   constexpr error_handler(const error_handler&) = default;
 
   // This function is intentionally not constexpr to give a compile-time error.
-  FMT_NORETURN FMT_API void on_error(const char* message) {
+  FMT_NORETURN void on_error(const char* message) {
     throw_format_error(message);
   }
 };