diff --git a/fsfe.xsl b/fsfe.xsl
index cbcad1c3f2..1cd87c678b 100644
--- a/fsfe.xsl
+++ b/fsfe.xsl
@@ -1,8 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<xsl:stylesheet version="1.0"
-  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  exclude-result-prefixes="doc str dt">
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 
   <xsl:import href="tools/xsltsl/translations.xsl" />
   <xsl:import href="tools/xsltsl/static-elements.xsl" />
diff --git a/index.xsl b/index.xsl
index eeaa5e9725..3335e627e8 100644
--- a/index.xsl
+++ b/index.xsl
@@ -2,7 +2,8 @@
 
 <xsl:stylesheet version="1.0"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  xmlns:dt="http://xsltsl.org/date-time">
+  xmlns:dt="http://xsltsl.org/date-time"
+  exclude-result-prefixes="dt">
   
   <xsl:import href="tools/xsltsl/date-time.xsl" />
   <xsl:import href="tools/xsltsl/tagging.xsl" />