diff --git a/configure b/configure
index e0abd9d7..ba4c3afb 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.68 for parallel 20110722.
+# Generated by GNU Autoconf 2.68 for parallel 20110822.
 #
 # Report bugs to <bug-parallel@gnu.org>.
 #
@@ -559,8 +559,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='parallel'
 PACKAGE_TARNAME='parallel'
-PACKAGE_VERSION='20110722'
-PACKAGE_STRING='parallel 20110722'
+PACKAGE_VERSION='20110822'
+PACKAGE_STRING='parallel 20110822'
 PACKAGE_BUGREPORT='bug-parallel@gnu.org'
 PACKAGE_URL=''
 
@@ -1176,7 +1176,7 @@ 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 parallel 20110722 to adapt to many kinds of systems.
+\`configure' configures parallel 20110822 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1242,7 +1242,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of parallel 20110722:";;
+     short | recursive ) echo "Configuration of parallel 20110822:";;
    esac
   cat <<\_ACEOF
 
@@ -1309,7 +1309,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-parallel configure 20110722
+parallel configure 20110822
 generated by GNU Autoconf 2.68
 
 Copyright (C) 2010 Free Software Foundation, Inc.
@@ -1326,7 +1326,7 @@ 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 parallel $as_me 20110722, which was
+It was created by parallel $as_me 20110822, which was
 generated by GNU Autoconf 2.68.  Invocation command line was
 
   $ $0 $@
@@ -2141,7 +2141,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='parallel'
- VERSION='20110722'
+ VERSION='20110822'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2704,7 +2704,7 @@ 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 parallel $as_me 20110722, which was
+This file was extended by parallel $as_me 20110822, which was
 generated by GNU Autoconf 2.68.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -2766,7 +2766,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-parallel config.status 20110722
+parallel config.status 20110822
 configured by $0, generated by GNU Autoconf 2.68,
   with options \\"\$ac_cs_config\\"
 
diff --git a/src/parallel b/src/parallel
index bfb9679f..64619ec5 100755
--- a/src/parallel
+++ b/src/parallel
@@ -90,12 +90,14 @@ if($::opt_nonall or $::opt_onall) {
 	     ((defined $::opt_P) ? "-P $::opt_P" : ""),
 	     ((defined $::opt_u) ? "-u" : ""),
 	     ((defined $::opt_g) ? "-g" : ""),
+	     ((defined $::opt_D) ? "-D" : ""),
 	);
     my $suboptions =
 	join(" ",
 	     ((defined $::opt_u) ? "-u" : ""),
 	     ((defined $::opt_g) ? "-g" : ""),
 	     ((defined @::opt_v) ? "-vv" : ""),
+	     ((defined $::opt_D) ? "-D" : ""),
 	);
     ::debug("| parallel");
     open(PARALLEL,"| parallel $options") || die;