diff --git a/VERSION b/VERSION
index 6bd47844..b1993e83 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.302
+8.3.303
diff --git a/calma/calmaInt.h b/calma/calmaInt.h
index d3be62ef..c8a27e67 100644
--- a/calma/calmaInt.h
+++ b/calma/calmaInt.h
@@ -162,6 +162,7 @@ typedef enum { LABEL_TYPE_NONE, LABEL_TYPE_TEXT, LABEL_TYPE_PORT, LABEL_TYPE_CEL
     #define REWIND   rewind
     #define FILETYPE FILE *
     #define OFFTYPE  off_t
+    #define PaZOpen  PaOpen
 #endif
 
 /* Globals for Calma reading */
diff --git a/scripts/configure b/scripts/configure
index 7dcf9d4b..fed71267 100755
--- a/scripts/configure
+++ b/scripts/configure
@@ -746,6 +746,7 @@ ac_subst_files=''
 ac_user_opts='
 enable_option_checking
 with_gnu_ld
+enable_compression
 with_x
 with_distdir
 with_interpreter
@@ -1416,6 +1417,7 @@ Optional Features:
   --disable-option-checking  ignore unrecognized --enable/--with options
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --disable-compression        disable file compression
   --enable-memdebug            enable memory debugging
   --enable-modular        embed ext2sim and ext2spice packages
   --disable-locking        disable file locking
@@ -5033,7 +5035,16 @@ $as_echo "#define HAVE___VA_COPY 1" >>confdefs.h
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for gzopen in -lz" >&5
+# Check whether --enable-compression was given.
+if test "${enable_compression+set}" = set; then :
+  enableval=$enable_compression;
+else
+  enable_compression=yes
+fi
+
+
+if test "x$enable_compression" = "xyes" ; then
+   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for gzopen in -lz" >&5
 $as_echo_n "checking for gzopen in -lz... " >&6; }
 if ${ac_cv_lib_z_gzopen+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -5075,6 +5086,7 @@ $as_echo "#define HAVE_ZLIB 1" >>confdefs.h
 
 fi
 
+fi
 
 
 
diff --git a/scripts/configure.in b/scripts/configure.in
index 837a7752..97dbb01d 100644
--- a/scripts/configure.in
+++ b/scripts/configure.in
@@ -178,8 +178,16 @@ then
     AC_DEFINE(HAVE___VA_COPY, 1, [Define if we have __va_copy])
 fi
 
+dnl Allow file compression (zlib) to be disabled
+AC_ARG_ENABLE(compression,
+[  --disable-compression        disable file compression],
+[],
+[enable_compression=yes])
+
 dnl Check for zlib
-AC_CHECK_LIB([z],[gzopen],[AC_DEFINE([HAVE_ZLIB],[1],["zlib compression"])])  
+if test "x$enable_compression" = "xyes" ; then
+   AC_CHECK_LIB([z],[gzopen],[AC_DEFINE([HAVE_ZLIB],[1],["zlib compression"])])  
+fi
 
 dnl Check for some C99 functions