diff --git a/CHANGES b/CHANGES
index 2ecda4a..a557cd7 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+0.1.28   (2015-03-10)
+    - minor changes: .spec update, non-silent failure on wrong af,
+    more room for masklen...
+
 0.1.27   (2015-03-10)
     - bugfix: some ipv6 prefixes were not parsed correctly since 0.1.26.
     Thanks to Job Snijders.
diff --git a/bgpq3.c b/bgpq3.c
index e47aa37..5c52965 100644
--- a/bgpq3.c
+++ b/bgpq3.c
@@ -414,10 +414,15 @@ main(int argc, char* argv[])
 			};
 		} else {
 			char* c = strchr(argv[0], '^');
-			if (!c && !bgpq_expander_add_prefix(&expander,argv[0]))
+			if (!c && !bgpq_expander_add_prefix(&expander,argv[0])) {
+				sx_report(SX_ERROR, "Unable to add prefix %s (bad prefix or "
+					"address-family)\n", argv[0]);
 				exit(1);
-			else if (!bgpq_expander_add_prefix_range(&expander,argv[0]))
+			} else if (c && !bgpq_expander_add_prefix_range(&expander,argv[0])){
+				sx_report(SX_ERROR, "Unable to add prefix-range %s (bad range "
+					"or address-family)\n", argv[0]);
 				exit(1);
+			};
 		};
 		argv++;
 		argc--;
diff --git a/bgpq3.spec b/bgpq3.spec
index 254da6f..39d4a0e 100644
--- a/bgpq3.spec
+++ b/bgpq3.spec
@@ -1,12 +1,12 @@
 Name:           bgpq3
-Version:        0.1.25
+Version:        0.1.28
 Release:        0%{?dist}
 
 Group:          System/Utilities
 Summary:        Automate BGP filter generation based on routing database information
 URL:            http://snar.spb.ru/prog/bgpq3/
 License:        BSD
-Source0:        http://snar.spb.ru/prog/bgpq3/bgpq3-0.1.25.tgz
+Source0:        http://snar.spb.ru/prog/bgpq3/bgpq3-0.1.28.tgz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 %description
@@ -35,6 +35,9 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Tue Mar 10 Alexandre Snarskii <snar@snar.spb.ru> 0.1.28
+- Version updated
+
 * Wed Oct 29 Alexandre Snarskii <snar@snar.spb.ru> 0.1.25
 - Version updated
 
diff --git a/configure b/configure
index ff71282..1a077f6 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for bgpq3 0.1.27.
+# Generated by GNU Autoconf 2.69 for bgpq3 0.1.28.
 #
 # Report bugs to <snar@snar.spb.ru>.
 #
@@ -579,8 +579,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='bgpq3'
 PACKAGE_TARNAME='bgpq3'
-PACKAGE_VERSION='0.1.27'
-PACKAGE_STRING='bgpq3 0.1.27'
+PACKAGE_VERSION='0.1.28'
+PACKAGE_STRING='bgpq3 0.1.28'
 PACKAGE_BUGREPORT='snar@snar.spb.ru'
 PACKAGE_URL=''
 
@@ -1187,7 +1187,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures bgpq3 0.1.27 to adapt to many kinds of systems.
+\`configure' configures bgpq3 0.1.28 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1248,7 +1248,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of bgpq3 0.1.27:";;
+     short | recursive ) echo "Configuration of bgpq3 0.1.28:";;
    esac
   cat <<\_ACEOF
 
@@ -1327,7 +1327,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-bgpq3 configure 0.1.27
+bgpq3 configure 0.1.28
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1495,7 +1495,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by bgpq3 $as_me 0.1.27, which was
+It was created by bgpq3 $as_me 0.1.28, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -3413,7 +3413,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by bgpq3 $as_me 0.1.27, which was
+This file was extended by bgpq3 $as_me 0.1.28, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -3475,7 +3475,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-bgpq3 config.status 0.1.27
+bgpq3 config.status 0.1.28
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.in b/configure.in
index efc7eca..e809264 100644
--- a/configure.in
+++ b/configure.in
@@ -1,4 +1,4 @@
-AC_INIT(bgpq3,0.1.27,snar@snar.spb.ru)
+AC_INIT(bgpq3,0.1.28,snar@snar.spb.ru)
 AC_CONFIG_HEADER(config.h)
 AC_PROG_CC
 AC_PROG_INSTALL
diff --git a/sx_prefix.c b/sx_prefix.c
index 910c779..10fd4e0 100644
--- a/sx_prefix.c
+++ b/sx_prefix.c
@@ -52,7 +52,7 @@ sx_prefix_parse(struct sx_prefix* p, int af, char* text)
 {
 	char* c=NULL;
 	int masklen, ret;
-	char mtext[INET6_ADDRSTRLEN+1];
+	char mtext[INET6_ADDRSTRLEN+5];
 	strlcpy(mtext, text, sizeof(mtext));
 
 	c=strchr(mtext,'/');