diff --git a/debian/changelog b/debian/changelog
index f75992a7..aeea7377 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -16,6 +16,9 @@ byobu (4.3) unreleased; urgency=low
       ignore network traffic less than threshold, less busy status
     - add support for a disk threshold setting; set to 50kB/s by default,
       ignore disk traffic less than threshold, less busy status
+  * usr/bin/byobu-janitor:
+    - on initial setup, if it looks like we're running in ec2, enable
+      ec2_cost monitor
 
   [ Scott Moser ]
   * usr/lib/byobu/.shutil: fix rounding across a decimal point in fpdiv()
diff --git a/usr/bin/byobu-janitor b/usr/bin/byobu-janitor
index d5ea05ee..45773f5d 100755
--- a/usr/bin/byobu-janitor
+++ b/usr/bin/byobu-janitor
@@ -109,6 +109,8 @@ if [ ! -r "$DATA/status" ]; then
 		skel=/dev/null
 	fi
 	grep -A 999999 BEGIN_CUT_HERE $skel | grep -B 999999 END_CUT_HERE | grep -v CUT > "$DATA/status"
+	# If it looks like we're running in ec2, enable ec2_cost by default
+	[ -x /usr/sbin/update-grub-legacy-ec2 ] && sed -i "s/ec2_cost=.*/ec2_cost=1/" "$DATA/status"
 fi
 [ -r "$DATA/windows" ] || touch "$DATA/windows"
 [ -r "$HOME/.screenrc" ] || touch "$HOME/.screenrc"