===================================================================
RCS file: /cvs/mandoc/mdoc_validate.c,v
retrieving revision 1.358
retrieving revision 1.359
diff -u -p -r1.358 -r1.359
--- mandoc/mdoc_validate.c	2018/04/11 17:11:13	1.358
+++ mandoc/mdoc_validate.c	2018/08/01 13:46:15	1.359
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_validate.c,v 1.358 2018/04/11 17:11:13 schwarze Exp $ */
+/*	$Id: mdoc_validate.c,v 1.359 2018/08/01 13:46:15 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2018 Ingo Schwarze <schwarze@openbsd.org>
@@ -440,7 +440,7 @@ check_text_em(struct roff_man *mdoc, int ln, int pos, 
 		     np->string != '\0' &&
 		     isalpha((unsigned char)np->string[
 		       strlen(np->string) - 1])) ||
-		    (cp[2] != '\0' ?
+		    (cp[1] != '\0' && cp[2] != '\0' ?
 		     isalpha((unsigned char)cp[2]) :
 		     nn != NULL &&
 		     nn->type == ROFFT_TEXT &&