diff --git a/Tests/LibJS/test262-runner.cpp b/Tests/LibJS/test262-runner.cpp
index c0cf102369a..31890b743d0 100644
--- a/Tests/LibJS/test262-runner.cpp
+++ b/Tests/LibJS/test262-runner.cpp
@@ -550,7 +550,7 @@ void __assertion_failed(char const* assertion)
     handle_failed_assert(assertion);
 }
 #else
-[[noreturn]] void __assert_fail(char const* assertion, char const* file, unsigned int line, char const* function)
+extern "C" __attribute__((__noreturn__)) void __assert_fail(char const* assertion, char const* file, unsigned int line, char const* function)
 {
     auto full_message = String::formatted("{}:{}: {}: Assertion `{}' failed.", file, line, function, assertion);
     handle_failed_assert(full_message.characters());