diff -Nru librabbitmq-0.10.0/debian/changelog librabbitmq-0.10.0/debian/changelog
--- librabbitmq-0.10.0/debian/changelog	2021-10-07 12:17:49.000000000 +0200
+++ librabbitmq-0.10.0/debian/changelog	2021-11-17 14:22:23.000000000 +0100
@@ -1,3 +1,10 @@
+librabbitmq (0.10.0-1ubuntu1) jammy; urgency=medium
+
+  * d/p/ssl-remove-reference-to-FIPS_set_mode.patch: backported
+    to fix the build against OpenSSL 3.0 (LP: #1945812)
+
+ -- Simon Chopin <simon.chopin@canonical.com>  Wed, 17 Nov 2021 14:22:23 +0100
+
 librabbitmq (0.10.0-1build1) impish; urgency=medium
 
   * No-change rebuild to build packages with zstd compression.
diff -Nru librabbitmq-0.10.0/debian/control librabbitmq-0.10.0/debian/control
--- librabbitmq-0.10.0/debian/control	2020-01-11 20:13:36.000000000 +0100
+++ librabbitmq-0.10.0/debian/control	2021-11-17 14:22:23.000000000 +0100
@@ -1,7 +1,8 @@
 Source: librabbitmq
 Priority: optional
 Section: libs
-Maintainer: Michael Fladischer <fladi@debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Michael Fladischer <fladi@debian.org>
 Uploaders:
  Brian May <bam@debian.org>,
 Build-Depends:
diff -Nru librabbitmq-0.10.0/debian/patches/series librabbitmq-0.10.0/debian/patches/series
--- librabbitmq-0.10.0/debian/patches/series	2020-01-11 20:13:36.000000000 +0100
+++ librabbitmq-0.10.0/debian/patches/series	2021-11-17 14:21:11.000000000 +0100
@@ -1,3 +1,4 @@
 cmake_with_ssl.patch
 use_cmake_package.patch
 disable-test-basic.patch
+ssl-remove-reference-to-FIPS_set_mode.patch
diff -Nru librabbitmq-0.10.0/debian/patches/ssl-remove-reference-to-FIPS_set_mode.patch librabbitmq-0.10.0/debian/patches/ssl-remove-reference-to-FIPS_set_mode.patch
--- librabbitmq-0.10.0/debian/patches/ssl-remove-reference-to-FIPS_set_mode.patch	1970-01-01 01:00:00.000000000 +0100
+++ librabbitmq-0.10.0/debian/patches/ssl-remove-reference-to-FIPS_set_mode.patch	2021-11-17 14:22:23.000000000 +0100
@@ -0,0 +1,37 @@
+From 23856b8cce06d0ed0a4e65f46bde27df409fe9f6 Mon Sep 17 00:00:00 2001
+From: Alan Antonuk <alan.antonuk@gmail.com>
+Date: Fri, 5 Mar 2021 06:44:15 +0000
+Subject: [PATCH] ssl: remove reference to FIPS_set_mode
+Origin: https://github.com/alanxz/rabbitmq-c/pull/657
+
+This was cargo-culted from the OpenSSL wiki for uninitializing OpenSSL.
+This API has been removed v3.x and newer of OpenSSL, additionally
+rabbitmq-c doesn't use FIPS mode, so this is likely a no-op even using
+older OpenSSL.
+
+Fixes #654
+Fixes #627
+
+Signed-off-by: GitHub <noreply@github.com>
+---
+ librabbitmq/amqp_openssl.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/librabbitmq/amqp_openssl.c b/librabbitmq/amqp_openssl.c
+index 0a37fe0..3cebd58 100644
+--- a/librabbitmq/amqp_openssl.c
++++ b/librabbitmq/amqp_openssl.c
+@@ -753,10 +753,6 @@ int amqp_uninitialize_ssl_library(void) {
+   ERR_remove_state(0);
+ #endif
+ 
+-#ifndef LIBRESSL_VERSION_NUMBER
+-  FIPS_mode_set(0);
+-#endif
+-
+   CRYPTO_set_locking_callback(NULL);
+   CRYPTO_set_id_callback(NULL);
+   {
+-- 
+2.32.0
+