diff --git a/CHANGES b/CHANGES
index 98d4e56..bd92892 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+0.1.22   (not tagged yet)
+    - bugfix: allow network object with stray spaces after prefix length.
+    Found by Tom Eichhorn in 2620:74:14::/48 (VeriSign Route6, RADB).
+
 0.1.21   (2014-06-05)
     - new flag -b: generate prefix-filters for BIRD (http://bird.network.cz),
     contributed by Job Snijders.
diff --git a/configure b/configure
index b217775..0bc7309 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 0.1.21.
+# Generated by GNU Autoconf 2.69 for bgpq3 0.1.22.
 #
 # Report bugs to <snar@snar.spb.ru>.
 #
@@ -579,8 +579,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='bgpq3'
 PACKAGE_TARNAME='bgpq3'
-PACKAGE_VERSION='0.1.21'
-PACKAGE_STRING='bgpq3 0.1.21'
+PACKAGE_VERSION='0.1.22'
+PACKAGE_STRING='bgpq3 0.1.22'
 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 0.1.21 to adapt to many kinds of systems.
+\`configure' configures bgpq3 0.1.22 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 0.1.21:";;
+     short | recursive ) echo "Configuration of bgpq3 0.1.22:";;
    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 0.1.21
+bgpq3 configure 0.1.22
 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 0.1.21, which was
+It was created by bgpq3 $as_me 0.1.22, 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 0.1.21, which was
+This file was extended by bgpq3 $as_me 0.1.22, 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 0.1.21
+bgpq3 config.status 0.1.22
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.in b/configure.in
index 63bb29d..9b92cf3 100644
--- a/configure.in
+++ b/configure.in
@@ -1,4 +1,4 @@
-AC_INIT(bgpq3,0.1.21,snar@snar.spb.ru)
+AC_INIT(bgpq3,0.1.22,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 75e31f6..10606df 100644
--- a/sx_prefix.c
+++ b/sx_prefix.c
@@ -2,6 +2,7 @@
 #include "config.h"
 #endif
 
+#include <ctype.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -56,7 +57,7 @@ sx_prefix_parse(struct sx_prefix* p, int af, char* text)
 		char* eod;
 		*c=0;
 		masklen=strtol(c+1,&eod,10);
-		if(eod[0]) { 
+		if(eod && eod[0] && !isspace(eod[0])) { 
 			*c='/';
 			sx_report(SX_ERROR,"Invalid masklen in prefix %s\n", text);
 			goto fixups;