diff --git a/ChangeLog b/ChangeLog
index 2b2152a..d9287ac 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -21,7 +21,7 @@ up compression" as it actually slowed it down instead of speeding it up.
 previous thread has finished its work, thus serialising the work and using less
 ram, making success more likely.
 * Fix some dodgy callocs which weren't really allocating enough ram.
-* Destory semaphores used in stream_in on closing the stream.
+* Destroy semaphores used in stream_in on closing the stream.
 * Minor output improvements.
 
 DECEMBER 2010, version 0.544 Con Kolivas
diff --git a/configure b/configure
index 8886b3b..a0e8c91 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.67 for lrzip 0.544.
+# Generated by GNU Autoconf 2.67 for lrzip 0.550.
 #
 # Report bugs to <kernel@kolivas.org>.
 #
@@ -551,9 +551,9 @@ MAKEFLAGS=
 
 # Identity of this package.
 PACKAGE_NAME='lrzip'
-PACKAGE_TARNAME='lrzip-0.544'
-PACKAGE_VERSION='0.544'
-PACKAGE_STRING='lrzip 0.544'
+PACKAGE_TARNAME='lrzip-0.550'
+PACKAGE_VERSION='0.550'
+PACKAGE_STRING='lrzip 0.550'
 PACKAGE_BUGREPORT='kernel@kolivas.org'
 PACKAGE_URL=''
 
@@ -1221,7 +1221,7 @@ 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 lrzip 0.544 to adapt to many kinds of systems.
+\`configure' configures lrzip 0.550 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1269,7 +1269,7 @@ Fine tuning of the installation directories:
   --infodir=DIR           info documentation [DATAROOTDIR/info]
   --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
   --mandir=DIR            man documentation [DATAROOTDIR/man]
-  --docdir=DIR            documentation root [DATAROOTDIR/doc/lrzip-0.544]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/lrzip-0.550]
   --htmldir=DIR           html documentation [DOCDIR]
   --dvidir=DIR            dvi documentation [DOCDIR]
   --pdfdir=DIR            pdf documentation [DOCDIR]
@@ -1286,7 +1286,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of lrzip 0.544:";;
+     short | recursive ) echo "Configuration of lrzip 0.550:";;
    esac
   cat <<\_ACEOF
 
@@ -1375,7 +1375,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-lrzip configure 0.544
+lrzip configure 0.550
 generated by GNU Autoconf 2.67
 
 Copyright (C) 2010 Free Software Foundation, Inc.
@@ -2014,7 +2014,7 @@ 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 lrzip $as_me 0.544, which was
+It was created by lrzip $as_me 0.550, which was
 generated by GNU Autoconf 2.67.  Invocation command line was
 
   $ $0 $@
@@ -5324,7 +5324,7 @@ cat >>$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 lrzip $as_me 0.544, which was
+This file was extended by lrzip $as_me 0.550, which was
 generated by GNU Autoconf 2.67.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -5386,7 +5386,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-lrzip config.status 0.544
+lrzip config.status 0.550
 configured by $0, generated by GNU Autoconf 2.67,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 592611c..c4cf70f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT([lrzip],[0.544],[kernel@kolivas.org],[lrzip-0.544])
+AC_INIT([lrzip],[0.550],[kernel@kolivas.org],[lrzip-0.550])
 AC_CONFIG_HEADER(config.h)
 # see what our system is!
 AC_CANONICAL_HOST