===================================================================
RCS file: /cvs/mandoc/mdoc_validate.c,v
retrieving revision 1.117
retrieving revision 1.119
diff -u -p -r1.117 -r1.119
--- mandoc/mdoc_validate.c	2010/09/27 09:26:27	1.117
+++ mandoc/mdoc_validate.c	2010/09/27 23:03:44	1.119
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_validate.c,v 1.117 2010/09/27 09:26:27 kristaps Exp $ */
+/*	$Id: mdoc_validate.c,v 1.119 2010/09/27 23:03:44 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -265,7 +265,7 @@ const	struct valids mdoc_valids[MDOC_MAX] = {
 	{ NULL, NULL },				/* Dx */
 	{ NULL, posts_text },			/* %Q */
 	{ NULL, posts_notext },			/* br */
-	{ NULL, posts_sp },			/* sp */
+	{ pres_pp, posts_sp },			/* sp */
 	{ NULL, posts_text1 },			/* %U */
 	{ NULL, NULL },				/* Ta */
 };
@@ -1473,7 +1473,12 @@ static int
 pre_pp(PRE_ARGS)
 {
 
-	if (NULL == mdoc->last || MDOC_Pp != mdoc->last->tok)
+	if (NULL == mdoc->last)
+		return(1);
+
+	/* Don't allow prior `Lp' or `Pp'. */
+
+	if (MDOC_Pp != mdoc->last->tok && MDOC_Lp != mdoc->last->tok)
 		return(1);
 
 	if (MDOC_Bl == n->tok && n->data.Bl->comp)