diff --git a/acinclude.m4 b/acinclude.m4
index 4b73a5b..9f2dc30 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -61,9 +61,11 @@ AC_DEFUN([COMPILER_FLAGS], [
 		with_cflags="$with_cflags -Wcast-align"
 		with_cflags="$with_cflags -Wswitch-enum"
 		with_cflags="$with_cflags -Wformat -Wformat-security"
+		with_cflags="$with_cflags -Wstringop-overflow"
 		with_cflags="$with_cflags -DG_DISABLE_DEPRECATED"
 		with_cflags="$with_cflags -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_28"
 		with_cflags="$with_cflags -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32"
+		with_cflags="$with_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3"
 	fi
 	AC_SUBST([WARNING_CFLAGS], $with_cflags)
 ])