diff --git a/bin/disk-available b/bin/disk-available
index e9ead3e3..9e7b633b 100755
--- a/bin/disk-available
+++ b/bin/disk-available
@@ -20,7 +20,7 @@
 PKG="byobu"
 
 if [ "$1" = "--detail" ]; then
-	df -h
+	df -h -P
 	exit 0
 fi
 
@@ -35,5 +35,5 @@ fi
 # Default to /, but let users override
 [ -r "$HOME/.$PKG/disk" ] && MP=`cat "$HOME/.$PKG/disk"` || MP="/"
 
-d=`df -h "$MP" | tail -n 1 | awk '{print $2}'`
+d=`df -h -P "$MP" | tail -n 1 | awk '{print $2}'`
 printf "\005{= MW}%sB%s\005{-}%s" "$d" "$comma" "$whitespace"
diff --git a/bin/disk-used b/bin/disk-used
index 9b6a9263..582db2d8 100755
--- a/bin/disk-used
+++ b/bin/disk-used
@@ -20,7 +20,7 @@
 PKG="byobu"
 
 if [ "$1" = "--detail" ]; then
-	df -h
+	df -h -P
 	exit 0
 fi
 
@@ -32,5 +32,5 @@ fi
 # Default to /, but let users override
 [ -r "$HOME/.$PKG/disk" ] && MP=`cat "$HOME/.$PKG/disk"` || MP="/"
 
-used=`df -h "$MP" | tail -n 1 | sed "s/%.*$/%/" | sed "s/^.* //"`
+used=`df -h -P "$MP" | tail -n 1 | sed "s/%.*$/%/" | sed "s/^.* //"`
 printf "\005{= MW}%s\005{-}%s" "$used" "$whitespace"
diff --git a/debian/changelog b/debian/changelog
index 4e90dd7e..d89bc9b0 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -6,8 +6,9 @@ byobu (2.9) unreleased; urgency=low
     in iwconfig and ifconfig paths
   * bin/cpu-count: performance improvement, use getconf
   * bin/cpu-freq: performance improvement, simplify pipes
+  * bin/disk-*: use the POSIX output format
 
- -- Dustin Kirkland <kirkland@ubuntu.com>  Mon, 08 Jun 2009 11:38:05 -0500
+ -- Dustin Kirkland <kirkland@ubuntu.com>  Mon, 08 Jun 2009 11:40:33 -0500
 
 byobu (2.8-0ubuntu1) karmic; urgency=low