diff --git a/os/various/cpp_wrappers/syscalls_cpp.hpp b/os/various/cpp_wrappers/syscalls_cpp.hpp
index 927f71f88..681ce2cb2 100644
--- a/os/various/cpp_wrappers/syscalls_cpp.hpp
+++ b/os/various/cpp_wrappers/syscalls_cpp.hpp
@@ -1,8 +1,8 @@
 #ifndef SYSCALLS_CPP_HPP_
 #define SYSCALLS_CPP_HPP_
 
-/* The ABI requires a 64-bit type.  */
-__extension__ typedef int __guard __attribute__((mode (__DI__)));
+/* The ABI requires a 32-bit type.*/
+typedef int __guard;
 
 int __cxa_guard_acquire(__guard *);
 void __cxa_guard_release (__guard *);
@@ -10,5 +10,4 @@ void __cxa_guard_abort (__guard *);
 
 void *__dso_handle = NULL;
 
-
 #endif /* SYSCALLS_CPP_HPP_ */