diff --git a/tools/perf/Documentation/Makefile b/tools/perf/Documentation/Makefile
index 3ba1c0b..2f5070f 100644
--- a/tools/perf/Documentation/Makefile
+++ b/tools/perf/Documentation/Makefile
@@ -49,7 +49,7 @@ man7dir=$(mandir)/man7
 ASCIIDOC=asciidoc
 ASCIIDOC_EXTRA = --unsafe
 MANPAGE_XSL = manpage-normal.xsl
-XMLTO_EXTRA =
+XMLTO_EXTRA = --skip-validation
 INSTALL?=install
 RM ?= rm -f
 DOC_REF = origin/man