diff --git a/0001-Fix-memory-leak-Issue-49.patch b/0001-Fix-memory-leak-Issue-49.patch
new file mode 100644
index 0000000..038bea7
--- /dev/null
+++ b/0001-Fix-memory-leak-Issue-49.patch
@@ -0,0 +1,47 @@
+From e38d6dc448dcb19247280b4adf63b89d673b8666 Mon Sep 17 00:00:00 2001
+From: Michael R Sweet <msweet@msweet.org>
+Date: Mon, 23 Nov 2020 22:15:26 -0500
+Subject: [PATCH] Fix memory leak (Issue #49)
+
+---
+ CHANGES-OPENPRINTING.md | 1 +
+ cups/http-support.c     | 9 +++++++--
+ 2 files changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/cups/http-support.c b/cups/http-support.c
+index 521b7e06b..b0506c976 100644
+--- a/cups/http-support.c
++++ b/cups/http-support.c
+@@ -1,8 +1,9 @@
+ /*
+  * HTTP support routines for CUPS.
+  *
+- * Copyright 2007-2019 by Apple Inc.
+- * Copyright 1997-2007 by Easy Software Products, all rights reserved.
++ * Copyright © 2020 by Michael R Sweet
++ * Copyright © 2007-2019 by Apple Inc.
++ * Copyright © 1997-2007 by Easy Software Products, all rights reserved.
+  *
+  * Licensed under Apache License v2.0.  See the file "LICENSE" for more
+  * information.
+@@ -2545,6 +2546,8 @@ http_resolve_cb(
+     memcpy(uuid, value, valueLen);
+     uuid[valueLen] = '\0';
+ 
++    avahi_free(value);
++
+     if (_cups_strcasecmp(uuid, uribuf->uuid))
+     {
+       if (uribuf->options & _HTTP_RESOLVE_STDERR)
+@@ -2629,6 +2632,8 @@ http_resolve_cb(
+       memcpy(resource + 1, value, valueLen);
+       resource[valueLen + 1] = '\0';
+     }
++
++    avahi_free(value);
+   }
+   else
+   {
+-- 
+2.26.2
+
diff --git a/cups.spec b/cups.spec
index db54ea3..3493581 100644
--- a/cups.spec
+++ b/cups.spec
@@ -15,7 +15,7 @@ Summary: CUPS printing system
 Name: cups
 Epoch: 1
 Version: 2.3.3
-Release: 19%{?dist}
+Release: 20%{?dist}
 License: ASL 2.0
 Url: http://www.cups.org/
 Source0: https://github.com/apple/cups/releases/download/v%{VERSION}/cups-%{VERSION}-source.tar.gz
@@ -123,6 +123,7 @@ Patch29: cups-manual-copies.patch
 # freed as a different attribute type than it was allocated
 # backported from upstream https://github.com/OpenPrinting/cups/pull/43
 Patch30: 0001-backend-scheduler-ipp.c-Fix-printer-alert-invalid-fr.patch
+Patch31: 0001-Fix-memory-leak-Issue-49.patch
 
 ##### Patches removed because IMHO they aren't no longer needed
 ##### but still I'll leave them in git in case their removal
@@ -342,6 +343,7 @@ to CUPS daemon. This solution will substitute printer drivers and raw queues in
 %patch28 -p1 -b .ipptool-mdns-uri
 %patch29 -p1 -b .manual-copies
 %patch30 -p1 -b .printer-alert
+%patch31 -p1 -b .avahi-leak
 
 
 # if cupsd is set to log into /var/log/cups, then 'MaxLogSize 0' needs to be
@@ -768,6 +770,9 @@ rm -f %{cups_serverbin}/backend/smb
 %{_mandir}/man7/ippevepcl.7.gz
 
 %changelog
+* Tue Nov 24 2020 Zdenek Dohnal <zdohnal@redhat.com> - 1:2.3.3-20
+- fix memory leak during device discovery
+
 * Thu Nov 12 2020 Zdenek Dohnal <zdohnal@redhat.com> - 1:2.3.3-19
 - 1897023 - Cups service restart sequence during upgrade incorrect