diff --git a/doc/publican/meson.build b/doc/publican/meson.build
index 60305f49..eac3e9b2 100644
--- a/doc/publican/meson.build
+++ b/doc/publican/meson.build
@@ -7,6 +7,7 @@ custom_target(
 	command: [
 		xmlto,
 		'--skip-validation',
+		'--stringparam', 'chunker.output.encoding=UTF-8',
 		'--stringparam', 'chunk.section.depth=0',
 		'--stringparam', 'toc.section.depth=1',
 		'--stringparam', 'generate.consistent.ids=1',