diff --git a/SOURCES/dnsmasq-2.81-rh1829448.patch b/SOURCES/dnsmasq-2.81-rh1829448.patch
new file mode 100644
index 0000000..f31b230
--- /dev/null
+++ b/SOURCES/dnsmasq-2.81-rh1829448.patch
@@ -0,0 +1,62 @@
+From 3d113137fd64cd0723cbecab6a36a75d3ecfb0a6 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Harald=20Jens=C3=A5s?= <hjensas@redhat.com>
+Date: Thu, 7 May 2020 00:33:54 +0200
+Subject: [PATCH 1/1] Fix regression in s_config_in_context() method
+
+Prior to commit 137286e9baecf6a3ba97722ef1b49c851b531810
+a config would not be considered in context if:
+a) it has no address family flags set
+b) it has the address family flag of current context set
+
+Since above commit config is considered in context if the
+address family is the opposite of current context.
+
+The result is that a config with two dhcp-host records,
+one for IPv6 and another for IPv4 no longer works, for
+example with the below config the config with the IPv6
+address would be considered in context for a DHCP(v4)
+request.
+ dhcp-host=52:54:00:bc:c3:fd,172.20.0.11,host2
+ dhcp-host=52:54:00:bc:c3:fd,[fd12:3456:789a:1::aadd],host2
+
+This commit restores the previous behavior.
+---
+ src/dhcp-common.c | 10 +++++++---
+ 1 file changed, 7 insertions(+), 3 deletions(-)
+
+diff --git a/src/dhcp-common.c b/src/dhcp-common.c
+index eae9886..ffc78ca 100644
+--- a/src/dhcp-common.c
++++ b/src/dhcp-common.c
+@@ -280,14 +280,18 @@ static int is_config_in_context(struct dhcp_context *context, struct dhcp_config
+ {
+   if (!context) /* called via find_config() from lease_update_from_configs() */
+     return 1; 
+-  
++
++  /* No address present in config == in context */
++  if (!(config->flags & (CONFIG_ADDR | CONFIG_ADDR6)))
++    return 1;
++
+ #ifdef HAVE_DHCP6
+   if (context->flags & CONTEXT_V6)
+     {
+        struct addrlist *addr_list;
+ 
+        if (!(config->flags & CONFIG_ADDR6))
+-	 return 1;
++	 return 0;
+        
+         for (; context; context = context->current)
+ 	  for (addr_list = config->addr6; addr_list; addr_list = addr_list->next)
+@@ -303,7 +307,7 @@ static int is_config_in_context(struct dhcp_context *context, struct dhcp_config
+ #endif
+     {
+       if (!(config->flags & CONFIG_ADDR))
+-	return 1;
++	return 0;
+       
+       for (; context; context = context->current)
+ 	if ((config->flags & CONFIG_ADDR) && is_same_net(config->addr, context->start, context->netmask))
+-- 
+2.25.4
diff --git a/SPECS/dnsmasq.spec b/SPECS/dnsmasq.spec
index a2dc4b1..b766add 100644
--- a/SPECS/dnsmasq.spec
+++ b/SPECS/dnsmasq.spec
@@ -13,7 +13,7 @@
 
 Name:           dnsmasq
 Version:        2.79
-Release:        11%{?extraversion:.%{extraversion}}%{?dist}
+Release:        11%{?extraversion:.%{extraversion}}%{?dist}.1
 Summary:        A lightweight DHCP/caching DNS server
 
 License:        GPLv2 or GPLv3
@@ -50,6 +50,7 @@ Patch17:        dnsmasq-2.81-prefix-ranges-or-list-of-ipv6-addresses.patch
 # http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=52ec7836139e7a11374971905e5ac0d2d02e32c0
 Patch18:        dnsmasq-2.81-tag-filtering-of-dhcp-host-directives.patch
 Patch19:        dnsmasq-2.81-correct-range-check-of-dhcp-host-prefix.patch
+Patch20:        dnsmasq-2.81-rh1829448.patch
 
 # This is workaround to nettle bug #1549190
 # https://bugzilla.redhat.com/show_bug.cgi?id=1549190
@@ -102,6 +103,7 @@ server's leases.
 %patch17 -p1 -b .rh1779187-2
 %patch18 -p1 -b .rh1779187-3
 %patch19 -p1 -b .rh1779187-4
+%patch20 -p1 -b .rh1829448
 
 # use /var/lib/dnsmasq instead of /var/lib/misc
 for file in dnsmasq.conf.example man/dnsmasq.8 man/es/dnsmasq.8 src/config.h; do
@@ -202,6 +204,9 @@ install -Dpm 644 %{SOURCE2} %{buildroot}%{_sysusersdir}/dnsmasq.conf
 %{_mandir}/man1/dhcp_*
 
 %changelog
+* Mon May 18 2020 Petr Menšík <pemensik@redhat.com> - 2.79-11.1
+- Fix mixed address family reservations on DHCP (#1829448)
+
 * Mon Mar 02 2020 Petr Menšík <pemensik@redhat.com> - 2.79-11
 - Support multiple static leases for single mac on IPv6 (#1779187)