diff -Naur fwupd-orig/plugins/uefi/efi/meson.build fwupd-fixed/plugins/uefi/efi/meson.build
--- fwupd-orig/plugins/uefi/efi/meson.build	2018-08-08 22:19:56.928710989 +0800
+++ fwupd-fixed/plugins/uefi/efi/meson.build	2018-08-08 22:22:54.179823966 +0800
@@ -50,6 +50,7 @@
 debugdir = join_paths (libdir, 'debug')
 compile_args = ['-Og',
                 '-g3',
+                '-U_FORTIFY_SOURCE',
                 '-Wp,-D_FORTIFY_SOURCE=2',
                 '--param=ssp-buffer-size=4',
                 '-fexceptions',