diff --git a/src/libraries/libc/__j6libc/casts.h b/src/libraries/libc/__j6libc/casts.h
index 5352bee..2bd5c9a 100644
--- a/src/libraries/libc/__j6libc/casts.h
+++ b/src/libraries/libc/__j6libc/casts.h
@@ -31,6 +31,7 @@ inline T cast_to(S p) { return reinterpret_cast<T>(p); }
 */
 
 template <typename T, typename S>
+__attribute__ ((always_inline))
 inline T cast_to(S p) {
     return reinterpret_cast<T>(const_cast<typename non_const<S>::type>(p));
 }