diff --git a/usr.bin/sort/mem.c b/usr.bin/sort/mem.c
index dea37bb3a110..18794666da51 100644
--- a/usr.bin/sort/mem.c
+++ b/usr.bin/sort/mem.c
@@ -1,83 +1,93 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
  *
  * Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
  * Copyright (C) 2012 Oleg Moskalenko <mom040267@gmail.com>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <err.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "mem.h"
 
+void*
+sort_calloc(size_t nb, size_t size)
+{
+	void *ptr;
+
+	if ((ptr = calloc(nb, size)) == NULL)
+		err(2, NULL);
+	return (ptr);
+}
+
 /*
  * malloc() wrapper.
  */
 void *
 sort_malloc(size_t size)
 {
 	void *ptr;
 
 	if ((ptr = malloc(size)) == NULL)
 		err(2, NULL);
 	return (ptr);
 }
 
 /*
  * free() wrapper.
  */
 void
 sort_free(const void *ptr)
 {
 
 	if (ptr)
 		free(__DECONST(void *, ptr));
 }
 
 /*
  * realloc() wrapper.
  */
 void *
 sort_realloc(void *ptr, size_t size)
 {
 
 	if ((ptr = realloc(ptr, size)) == NULL)
 		err(2, NULL);
 	return (ptr);
 }
 
 char *
 sort_strdup(const char *str)
 {
 	char *dup;
 
 	if ((dup = strdup(str)) == NULL)
 		err(2, NULL);
 	return (dup);
 }
diff --git a/usr.bin/sort/mem.h b/usr.bin/sort/mem.h
index cb21d6d4a221..6a4edcd59161 100644
--- a/usr.bin/sort/mem.h
+++ b/usr.bin/sort/mem.h
@@ -1,47 +1,48 @@
 /*	$FreeBSD$	*/
 
 /*-
  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
  *
  * Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
  * Copyright (C) 2012 Oleg Moskalenko <mom040267@gmail.com>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #if !defined(__SORT_MEM_H__)
 #define	__SORT_MEM_H__
 
 #include <errno.h>
 #include <stdbool.h>
 #include <stdlib.h>
 
 /*
  * mem.c
  */
+void *sort_calloc(size_t, size_t);
 void *sort_malloc(size_t);
 void sort_free(const void *ptr);
 void *sort_realloc(void *, size_t);
 char *sort_strdup(const char *);
 
 #endif /* __SORT_MEM_H__ */