--- src/lisp.h.orig	2014-11-19 15:00:20.843528000 +0900
+++ src/lisp.h	2014-11-19 15:07:48.693175100 +0900
@@ -2810,7 +2810,11 @@
 /* A platform that uses neither _longjmp nor siglongjmp; assume
    longjmp does not affect the sigmask.  */
 typedef jmp_buf sys_jmp_buf;
+#if defined __MINGW64__ && defined __clang__
+# define sys_setjmp(j) _setjmp (j, NULL)
+#else
 # define sys_setjmp(j) setjmp (j)
+#endif
 # define sys_longjmp(j, v) longjmp (j, v)
 #endif