diff --git a/libc/include/assert.h b/libc/include/assert.h
index ae9059bc..22711c21 100644
--- a/libc/include/assert.h
+++ b/libc/include/assert.h
@@ -13,7 +13,7 @@
 
 __BEGIN_DECLS
 
-void __assert_fail(const char*, const char*, int, const char*);
+[[noreturn]] void __assert_fail(const char*, const char*, int, const char*);
 
 __END_DECLS