--- a/doc/c-strtod.texi
+++ b/doc/c-strtod.texi
@@ -1,6 +1,6 @@
 @c Documentation of gnulib module 'c-strtod'.
 
-@c Copyright (C) 2008 Free Software Foundation, Inc.
+@c Copyright (C) 2008-2009 Free Software Foundation, Inc.
 
 @c Permission is granted to copy, distribute and/or modify this document
 @c under the terms of the GNU Free Documentation License, Version 1.3 or
@@ -20,4 +20,9 @@
 @end smallexample
 
 In particular, only a period @samp{.} is accepted as decimal point, even
-when the current locale's notion of decimal point is a comma @samp{,}.
+when the current locale's notion of decimal point is a comma @samp{,},
+and no characters outside the basic character set are accepted.
+
+This function aborts via @code{xalloc_die} if it cannot allocate memory.
+On platforms without @code{strtod_l}, it is not safe for use in
+multi-threaded applications since it calls @code{setlocale}.