diff --git a/tools/compat/Makefile b/tools/compat/Makefile
index c5c241949715..c72c3e399ee1 100644
--- a/tools/compat/Makefile
+++ b/tools/compat/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.73 2015/01/18 18:09:10 christos Exp $
+#	$NetBSD: Makefile,v 1.74 2015/07/26 14:01:53 kamil Exp $
 
 HOSTLIB=	nbcompat
 
@@ -13,7 +13,7 @@ SRCS=		atoll.c basename.c cdbr.c cdbw.c dirname.c \
 		mi_vector_hash.c mkdtemp.c \
 		mkstemp.c pread.c putc_unlocked.c pwcache.c pwrite.c \
 		pw_scan.c \
-		raise_default_signal.c rmd160.c rmd160hl.c \
+		raise_default_signal.c reallocarr.c rmd160.c rmd160hl.c \
 		setenv.c setgroupent.c \
 		setpassent.c setprogname.c sha1.c sha1hl.c sha2.c \
 		sha256hl.c sha384hl.c sha512hl.c snprintb.c snprintf.c \
diff --git a/tools/compat/compat_defs.h b/tools/compat/compat_defs.h
index 9795047843f8..9c9e91909c54 100644
--- a/tools/compat/compat_defs.h
+++ b/tools/compat/compat_defs.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: compat_defs.h,v 1.101 2015/01/16 18:44:06 christos Exp $	*/
+/*	$NetBSD: compat_defs.h,v 1.102 2015/07/26 14:01:53 kamil Exp $	*/
 
 #ifndef	__NETBSD_COMPAT_DEFS_H__
 #define	__NETBSD_COMPAT_DEFS_H__
@@ -469,6 +469,10 @@ ssize_t pwrite(int, const void *, size_t, off_t);
 int raise_default_signal(int);
 #endif
 
+#if !HAVE_REALLOCARR
+int reallocarr(void *, size_t, size_t);
+#endif
+
 #if !HAVE_SETENV
 int setenv(const char *, const char *, int);
 #endif
diff --git a/tools/compat/configure b/tools/compat/configure
index 5686f4e9e411..eb76ffdafbf0 100755
--- a/tools/compat/configure
+++ b/tools/compat/configure
@@ -5044,7 +5044,7 @@ for ac_func in atoll asprintf asnprintf basename devname dirfd dirname \
 	getopt getopt_long group_from_gid gid_from_group \
 	heapsort isblank issetugid lchflags lchmod lchown lutimes mkstemp \
 	mkdtemp poll pread putc_unlocked pwcache_userdb pwcache_groupdb \
-	pwrite raise_default_signal random setenv \
+	pwrite raise_default_signal random reallocarr setenv \
 	setgroupent setprogname setpassent \
 	snprintb_m snprintf strlcat strlcpy strmode \
 	strndup strnlen strsep strsuftoll strtoi strtoll strtou \
diff --git a/tools/compat/configure.ac b/tools/compat/configure.ac
index 578175a74e2e..e040df47f8aa 100644
--- a/tools/compat/configure.ac
+++ b/tools/compat/configure.ac
@@ -1,4 +1,4 @@
-#	$NetBSD: configure.ac,v 1.83 2015/01/16 18:44:06 christos Exp $
+#	$NetBSD: configure.ac,v 1.84 2015/07/26 14:01:53 kamil Exp $
 #
 # Autoconf definition file for libnbcompat.
 #
@@ -157,7 +157,7 @@ AC_CHECK_FUNCS(atoll asprintf asnprintf basename devname dirfd dirname \
 	getopt getopt_long group_from_gid gid_from_group \
 	heapsort isblank issetugid lchflags lchmod lchown lutimes mkstemp \
 	mkdtemp poll pread putc_unlocked pwcache_userdb pwcache_groupdb \
-	pwrite raise_default_signal random setenv \
+	pwrite raise_default_signal random reallocarr setenv \
 	setgroupent setprogname setpassent \
 	snprintb_m snprintf strlcat strlcpy strmode \
 	strndup strnlen strsep strsuftoll strtoi strtoll strtou \
diff --git a/tools/compat/nbtool_config.h.in b/tools/compat/nbtool_config.h.in
index 25915e1a2bbc..3ec362321fe1 100644
--- a/tools/compat/nbtool_config.h.in
+++ b/tools/compat/nbtool_config.h.in
@@ -1,6 +1,6 @@
 /* nbtool_config.h.in.  Generated automatically from configure.ac by autoheader.  */
 
-/*      $NetBSD: nbtool_config.h.in,v 1.36 2015/01/16 18:44:31 christos Exp $    */
+/*      $NetBSD: nbtool_config.h.in,v 1.37 2015/07/26 14:01:53 kamil Exp $    */
  
 #ifndef __NETBSD_NBTOOL_CONFIG_H__
 #define __NETBSD_NBTOOL_CONFIG_H__
@@ -419,6 +419,9 @@
 /* Define if you have the `random' function. */
 #undef HAVE_RANDOM
 
+/* Define if you have the `reallocarr' function. */
+#undef HAVE_REALLOCARR
+
 /* Define if you have the <resolv.h> header file. */
 #undef HAVE_RESOLV_H