1 diff --git a/test-environ.c b/test-environ.c
2 index 46a2eab..8afecb7 100644
9 +/* environ is the exported symbol referencing the internal
10 + __cygwin_environ variable on cygwin64:
11 + <https://cygwin.com/ml/cygwin/2013-06/msg00228.html>. */
12 +#if defined __CYGWIN__ && defined __x86_64__
13 +extern DLL_VARIABLE char **environ;