diff --git a/Shorewall/Perl/Shorewall/Config.pm b/Shorewall/Perl/Shorewall/Config.pm
index a28ad4cd2..bce2e78a9 100644
--- a/Shorewall/Perl/Shorewall/Config.pm
+++ b/Shorewall/Perl/Shorewall/Config.pm
@@ -96,6 +96,8 @@ our %EXPORT_TAGS = ( internal => [ qw( create_temp_script
 				       close_file
 				       push_open
 				       pop_open
+				       add_params
+				       del_params
 				       read_a_line
 				       validate_level
 				       which
@@ -1781,6 +1783,29 @@ sub embedded_perl( $ ) {
     }
 }
 
+#
+# Add parameters
+#
+sub add_params( $ ) {
+    my $params = shift;
+
+    my @params = split /,/, $params;
+
+    for ( my $i = 1; $i <= @params; $i++ ) {
+	$params{$i} = $params[$i];
+    }
+}
+
+sub del_params( $ ) {
+    my $params = shift;
+
+    my @params = split /,/, $params;
+
+    for ( my $i = 1; $i <= @params; $i++ ) {
+	delete $params{$i};
+    }
+}
+
 #
 # Read a line from the current include stack.
 #
@@ -1857,7 +1882,7 @@ sub read_a_line(;$) {
 	    # Expand Shell Variables using %params and %ENV
 	    #
 	    #                            $1      $2      $3           -     $4
-	    while ( $currentline =~ m( ^(.*?) \$({)? ([a-zA-Z]\w*) (?(2)}) (.*)$ )x ) {
+	    while ( $currentline =~ m( ^(.*?) \$({)? (\w+) (?(2)}) (.*)$ )x ) {
 
 		unless ( exists $params{$3} ) {
 		    #
diff --git a/Shorewall/Perl/Shorewall/Rules.pm b/Shorewall/Perl/Shorewall/Rules.pm
index 2b82cb6a3..655aa45f4 100644
--- a/Shorewall/Perl/Shorewall/Rules.pm
+++ b/Shorewall/Perl/Shorewall/Rules.pm
@@ -342,8 +342,8 @@ sub process_actions1() {
 #
 # Generate chain for non-builtin action invocation
 #
-sub process_action3( $$$$$ ) {
-    my ( $chainref, $wholeaction, $action, $level, $tag ) = @_;
+sub process_action3( $$$$$$ ) {
+    my ( $chainref, $wholeaction, $action, $level, $tag, $param ) = @_;
     my $actionfile = find_file "action.$action";
     my $format = 1;
 
@@ -353,6 +353,8 @@ sub process_action3( $$$$$ ) {
 
     open_file $actionfile;
 
+    add_params( $param );
+
     while ( read_a_line ) {
 
 	my ($target, $source, $dest, $proto, $ports, $sports, $origdest, $rate, $user, $mark, $connlimit, $time, $headers );
@@ -550,7 +552,7 @@ sub process_actions3 () {
 	    $level = '' if $level =~ /none!?/;
 	    $builtinops{$action}->($chainref, $level, $tag, $param );
 	} else {
-	    process_action3 $chainref, $wholeaction, $action, $level, $tag;
+	    process_action3 $chainref, $wholeaction, $action, $level, $tag, $param;
 	}
     }
 }