diff --git a/new.cc b/new.cc
index 451f2e5..e46e302 100644
--- a/new.cc
+++ b/new.cc
@@ -1,8 +1,6 @@
 #include <bits/functexcept.h>
 #include <new>
 
-#define noreturn
-
 #include "h_malloc.h"
 #include "util.h"
 
diff --git a/util.h b/util.h
index f22ece5..3c7a428 100644
--- a/util.h
+++ b/util.h
@@ -2,7 +2,9 @@
 #define UTIL_H
 
 #include <stdint.h>
-#include <stdnoreturn.h>
+
+// C11 noreturn doesn't work in C++
+#define noreturn __attribute__((noreturn))
 
 #define likely(x) __builtin_expect(!!(x), 1)
 #define unlikely(x) __builtin_expect(!!(x), 0)