diff --git a/programs/fileio.c b/programs/fileio.c
index e0bba2087..66ccbc784 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -40,8 +40,11 @@
 /* *************************************
 *  Compiler Options
 ***************************************/
-#define _POSIX_SOURCE 1          /* enable %llu on Windows */
-#define _CRT_SECURE_NO_WARNINGS  /* removes Visual warning on strerror() */
+#ifdef _MSC_VER   /* Visual */
+#  define _POSIX_SOURCE 1          /* enable %llu on Windows */
+#  define _CRT_SECURE_NO_WARNINGS  /* removes Visual warning on strerror() */
+#  pragma warning(disable : 4204)  /* non-constant aggregate initializer */
+#endif
 
 
 /*-*************************************