diff --git a/debian/changelog b/debian/changelog
index 612eafe2..01225105 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,8 @@ byobu (2.56) unreleased; urgency=low
   * debian/control: drop byobu-extras empty package
   * usr/bin/byobu-launcher: fix recent regression, do exec byobu by default,
     but allow for not exec'ing if ~/.byobu/disable-exec exists, LP: #519018
+  * usr/lib/byobu/network: improve regex of the interface matching, which
+    was broken for device names >6 chars, LP: #509278
 
  -- Dustin Kirkland <kirkland@ubuntu.com>  Sat, 06 Feb 2010 22:10:52 -0600
 
diff --git a/usr/lib/byobu/network b/usr/lib/byobu/network
index 68f79322..cf378a1a 100755
--- a/usr/lib/byobu/network
+++ b/usr/lib/byobu/network
@@ -44,10 +44,10 @@ for i in up down; do
 		x1=`cat "$cache"` 2>/dev/null || tx1=0
 		if [ "$i" = "up" ]; then
 			symbol="^"
-			x2=`grep -m1 "\W$interface:" /proc/net/dev | sed "s/^.*://" | awk '{print $9}'`
+			x2=`grep -m1 "\b$interface:" /proc/net/dev | sed "s/^.*://" | awk '{print $9}'`
 		else
 			symbol="v"
-			x2=`grep -m1 "\W$interface:" /proc/net/dev | sed "s/^.*://" | awk '{print $1}'`
+			x2=`grep -m1 "\b$interface:" /proc/net/dev | sed "s/^.*://" | awk '{print $1}'`
 		fi
 		echo "$x2" > "$cache"
 		rate=`echo "$t1" "$t2" "$x1" "$x2" | awk '{printf "%.0f", ($4 - $3) / ($2 - $1) / 1024 }'`