diff --git a/share/mk/doc.docbook.mk b/share/mk/doc.docbook.mk
index 4fe8931334..33db62c8c5 100644
--- a/share/mk/doc.docbook.mk
+++ b/share/mk/doc.docbook.mk
@@ -230,7 +230,7 @@ LATEX?=		${PREFIX}/bin/latex
 PDFTEX?=	${PREFIX}/bin/pdftex
 GROFF?=		groff
 TIDY?=		${PREFIX}/bin/tidy
-TIDYOPTS?=	-i -m -raw -preserve -f /dev/null -asxml ${TIDYFLAGS}
+TIDYOPTS?=	-wrap 90 -m -raw -preserve -f /dev/null -asxml ${TIDYFLAGS}
 HTML2TXT?=	${PREFIX}/bin/links
 HTML2TXTOPTS?=	-dump ${HTML2TXTFLAGS}
 HTML2PDB?=	${PREFIX}/bin/iSiloBSD