diff --git a/Shorewall/firewall b/Shorewall/firewall
index 8db5f75f7..811a40d36 100755
--- a/Shorewall/firewall
+++ b/Shorewall/firewall
@@ -2856,7 +2856,7 @@ decodeaddr() {
     IFS=.
 
     for x in $1; do
-	temp=$(( $temp * 256 + $x ))
+	temp=$(( $(( $temp << 8 )) | $x ))
     done
 
     echo $temp
diff --git a/Shorewall/releasenotes.txt b/Shorewall/releasenotes.txt
index 830065fa5..51805f2f7 100755
--- a/Shorewall/releasenotes.txt
+++ b/Shorewall/releasenotes.txt
@@ -25,4 +25,4 @@ New Features:
 
    Example:
 
-	DNAT net loc:192.168.10.2-192.168.10.5 tcp 80
+	DNAT net loc:192.168.10.2-192.168.10.5 tcp 80
\ No newline at end of file