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diff --git a/gcc/d/implement-d.texi b/gcc/d/implement-d.texi
index 89a1791..039e5fb 100644
--- a/gcc/d/implement-d.texi
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@@ -2511,4 +2511,10 @@ version (GNU)
@}
@end smallexample
+@item TypeInfo-based va_arg
+The Digital Mars D compiler implements a version of @code{core.vararg.va_arg}
+that accepts a run-time @code{TypeInfo} argument for use when the static type
+is not known. This function is not implemented by GNU D. It is more portable
+to use variadic template functions instead.
+
@end table