diff -Nru cyrus-sasl2-2.1.25.dfsg1/debian/changelog cyrus-sasl2-2.1.25.dfsg1/debian/changelog
--- cyrus-sasl2-2.1.25.dfsg1/debian/changelog	2012-01-17 23:47:29.000000000 -0800
+++ cyrus-sasl2-2.1.25.dfsg1/debian/changelog	2012-05-03 12:45:25.000000000 -0700
@@ -1,3 +1,11 @@
+cyrus-sasl2 (2.1.25.dfsg1-3ubuntu0.1) precise-proposed; urgency=low
+
+  * Fix ABI incompatability during slapd upgrades (LP: #990742):
+    - debian/control: Set Breaks: 'slapd < 2.4.25-4' on libsasl2-2.
+    - deian/rules: Introduce shlib dependency on 2.1.24 for libsasl2-2.
+
+ -- Adam Gandelman <adamg@canonical.com>  Thu, 03 May 2012 12:39:35 -0700
+
 cyrus-sasl2 (2.1.25.dfsg1-3) unstable; urgency=low
 
   [ Thomas Preud'homme ]
diff -Nru cyrus-sasl2-2.1.25.dfsg1/debian/control cyrus-sasl2-2.1.25.dfsg1/debian/control
--- cyrus-sasl2-2.1.25.dfsg1/debian/control	2012-01-17 23:47:29.000000000 -0800
+++ cyrus-sasl2-2.1.25.dfsg1/debian/control	2012-05-03 12:43:44.000000000 -0700
@@ -39,7 +39,7 @@
 Pre-Depends: ${misc:Pre-Depends}
 Depends: ${shlibs:Depends}, ${misc:Depends}
 Recommends: libsasl2-modules (= ${binary:Version})
-Breaks: postfix (<= 2.8.3-1)
+Breaks: postfix (<= 2.8.3-1), slapd (<= 2.4.25-3)
 Replaces: libsasl2
 Description: Cyrus SASL - authentication abstraction library
  This is the Cyrus SASL API implementation, version 2.1.
diff -Nru cyrus-sasl2-2.1.25.dfsg1/debian/rules cyrus-sasl2-2.1.25.dfsg1/debian/rules
--- cyrus-sasl2-2.1.25.dfsg1/debian/rules	2012-01-17 23:47:29.000000000 -0800
+++ cyrus-sasl2-2.1.25.dfsg1/debian/rules	2012-05-03 12:44:54.000000000 -0700
@@ -232,7 +232,7 @@
 	dh_strip -plibsasl2-modules-gssapi-heimdal -Nsasl2-bin -Nlibsasl2-2 -Nlibsasl2-modules -Nlibsasl2-modules-ldap -Nlibsasl2-modules-otp -Nlibsasl2-modules-sql -Nlibsasl2-modules-gssapi-mit -Nlibsasl2-dev --dbg-package=cyrus-sasl2-heimdal-dbg
 
 override_dh_makeshlibs:
-	dh_makeshlibs -X/usr/lib/$(DEB_HOST_MULTIARCH)/sasl2
+	dh_makeshlibs -V "libsasl2-2 (>= 2.1.24)" -X/usr/lib/$(DEB_HOST_MULTIARCH)/sasl2
 
 override_dh_auto_test:
 	cd $(TMPBUILD_MIT)/saslauthd && $(MAKE) testsaslauthd