===================================================================
RCS file: /cvs/mandoc/term_tab.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -p -r1.1 -r1.2
--- mandoc/term_tab.c	2017/05/07 17:31:45	1.1
+++ mandoc/term_tab.c	2017/06/08 12:54:58	1.2
@@ -1,4 +1,4 @@
-/*	$OpenBSD: term_tab.c,v 1.1 2017/05/07 17:31:45 schwarze Exp $ */
+/*	$OpenBSD: term_tab.c,v 1.2 2017/06/08 12:54:58 schwarze Exp $ */
 /*
  * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
  *
@@ -68,7 +68,7 @@ term_tab_set(const struct termp *p, const char *arg)
 		arg++;
 	} else
 		add = 0;
-	if (a2roffsu(arg, &su, SCALE_EM) == 0)
+	if (a2roffsu(arg, &su, SCALE_EM) == NULL)
 		return;
 
 	/* Select the list, and extend it if it is full. */