diff --git a/tools/perf/Documentation/Makefile b/tools/perf/Documentation/Makefile
index 6e54979c2124..ccbc7a68769d 100644
--- a/tools/perf/Documentation/Makefile
+++ b/tools/perf/Documentation/Makefile
@@ -51,7 +51,7 @@ ASCIIDOC=asciidoc
 ASCIIDOC_EXTRA += --unsafe -f asciidoc.conf
 ASCIIDOC_HTML = xhtml11
 MANPAGE_XSL = manpage-normal.xsl
-XMLTO_EXTRA =
+XMLTO_EXTRA = --skip-validation
 INSTALL?=install
 RM ?= rm -f
 DOC_REF = origin/man