diff --git a/configure.ac b/configure.ac
index 3ebdf51..e8db2c2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -107,6 +107,7 @@ AC_FUNC_STRFTIME
 COMPAT_FUNC_STRLCPY
 COMPAT_FUNC_STRMODE
 COMPAT_FUNC_STRSEP
+AC_DEFINE([_FORTIFY_STDIO_H], [1], [disable fortify])
 
 dnl ### Check for libraries. #######################################
 AC_ARG_WITH([zlib],