diff --git a/src/lib/w32/getopt.c b/src/lib/w32/getopt.c
index 361462ef..ee23f4b1 100644
--- a/src/lib/w32/getopt.c
+++ b/src/lib/w32/getopt.c
@@ -1,3 +1,4 @@
+#ifdef _MSC_VER
 /* Getopt for GNU.
    NOTE: getopt is now part of the C library, so if you don't know what
    "Keep this file name-space clean" means, talk to drepper@gnu.org
@@ -985,3 +986,4 @@ getopt (argc, argv, optstring)
 }
 
 #endif	/* Not ELIDE_CODE.  */
+#endif  /* _MSC_VER */