diff --git a/debian/changelog b/debian/changelog
index 94895a52..7cc62693 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 livecd-rootfs (1.123) UNRELEASED; urgency=low
 
   * Make sure LIVE_BOOT_SCRIPTS is always defined.
+  * Convert to source format 3.0 (native).
 
  -- Colin Watson <cjwatson@ubuntu.com>  Sat, 26 Jun 2010 10:26:36 +0100
 
diff --git a/debian/source/format b/debian/source/format
new file mode 100644
index 00000000..89ae9db8
--- /dev/null
+++ b/debian/source/format
@@ -0,0 +1 @@
+3.0 (native)