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-rw-r--r--include/mach/message.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/mach/message.h b/include/mach/message.h
index 816d257a..17d3592f 100644
--- a/include/mach/message.h
+++ b/include/mach/message.h
@@ -282,8 +282,10 @@ typedef struct {
#ifdef __x86_64__
#ifdef __cplusplus
+#if __cplusplus >= 201103L
static_assert (sizeof (mach_msg_type_t) == sizeof (mach_msg_type_long_t),
"mach_msg_type_t and mach_msg_type_long_t need to have the same size.");
+#endif
#else
_Static_assert (sizeof (mach_msg_type_t) == sizeof (mach_msg_type_long_t),
"mach_msg_type_t and mach_msg_type_long_t need to have the same size.");