diff --git a/debian/changelog b/debian/changelog
index d439d76..6a423ca 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,8 @@ shim (13~git1505328971.0780644a-0ubuntu1~test1) UNRELEASED; urgency=medium
   * New upstream snapshot: 13~git1505328971.0780644a
   * debian/control: add a Build-Depends on libnss3-tools for pk12-util.
   * debian/control: add a Build-Depends on libelf-dev.
+  * debian/control: add Breaks: for the previous shim-signed builds given
+    that shim will now build and ship BOOT.CSV by itself.
   * debian/rules:
     - Update dh_auto_build/dh_auto_clean/dh_auto_install for new upstream
       options: set MAKELEVEL.
diff --git a/debian/control b/debian/control
index febdfb9..d0caba5 100644
--- a/debian/control
+++ b/debian/control
@@ -10,6 +10,7 @@ Vcs-Bzr: lp:~ubuntu-core-dev/shim/trunk
 Package: shim
 Architecture: amd64
 Depends: ${shlibs:Depends}, ${misc:Depends}
+Breaks: shim-signed (<< 1.33~)
 Description: boot loader to chain-load signed boot loaders under Secure Boot
  This package provides a minimalist boot loader which allows verifying
  signatures of other UEFI binaries against either the Secure Boot DB/DBX or