1 files changed, 1 insertions, 1 deletions
diff --git a/getopt.c b/getopt.c
index fa258382..a45e30f4 100644
--- a/getopt.c
+++ b/getopt.c
@@ -57,7 +57,7 @@
 
 /* This needs to come after some library #include
    to get __GNU_LIBRARY__ defined.  */
-#if defined (__GNU_LIBRARY__) || defined (__CYGWIN__) || defined(__DJGPP__) || defined(__APPLE__) || defined(__MINGW32__)
+#if defined (__GNU_LIBRARY__) || defined (__CYGWIN__) || defined(__DJGPP__) || defined(__APPLE__) || defined(__MINGW32__) || defined(__sun) /* Illumos */
 /* Don't include stdlib.h for
  * non-GNU C libraries
  * non-Cygwin