diff --git a/xslt/epub2i5.xsl b/xslt/epub2i5.xsl
index f786ed8..b23de65 100644
--- a/xslt/epub2i5.xsl
+++ b/xslt/epub2i5.xsl
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                 xmlns:xs="http://www.w3.org/2001/XMLSchema"
                 xmlns:opf="http://www.idpf.org/2007/opf"