diff --git a/6.0s1.h b/6.0s1.h
index 68693d9..7bc3a21 100644
--- a/6.0s1.h
+++ b/6.0s1.h
@@ -19,6 +19,11 @@ typedef char      s1_char;
 
 #   ifndef S1_6_0_H_IMPL
 
+#   ifdef _MSC_VER
+#       define  _CRT_SECURE_NO_WARNINGS
+#   endif
+
+
 #       include <stdio.h>
 #       include <stdlib.h>