===================================================================
RCS file: /cvs/mandoc/mandoc_aux.h,v
retrieving revision 1.4
retrieving revision 1.6
diff -u -p -r1.4 -r1.6
--- mandoc/mandoc_aux.h	2015/11/07 14:01:16	1.4
+++ mandoc/mandoc_aux.h	2017/02/17 14:31:52	1.6
@@ -1,4 +1,4 @@
-/*	$Id: mandoc_aux.h,v 1.4 2015/11/07 14:01:16 schwarze Exp $ */
+/*	$Id: mandoc_aux.h,v 1.6 2017/02/17 14:31:52 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -16,7 +16,8 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-int		  mandoc_asprintf(char **, const char *, ...);
+int		  mandoc_asprintf(char **, const char *, ...)
+			__attribute__((__format__ (__printf__, 2, 3)));
 void		 *mandoc_calloc(size_t, size_t);
 void		 *mandoc_malloc(size_t);
 void		 *mandoc_realloc(void *, size_t);