diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index e5bf254..32382bf 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue May  5 07:00:36 UTC 2020 - Ismail Dönmez <idonmez@suse.com>
+
+- Add mozilla-bmo1580963.patch to fix build with rust 1.43 
+
 -------------------------------------------------------------------
 Thu Apr  9 17:27:50 UTC 2020 - Andreas Stieger <andreas.stieger@gmx.de>
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index 8955d6c..6a47fb2 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -172,6 +172,7 @@ Patch21:        mozilla-bmo1554971.patch
 Patch22:        mozilla-nestegg-big-endian.patch
 Patch24:        mozilla-fix-top-level-asm.patch
 Patch25:        mozilla-bmo1504834-part4.patch
+Patch26:        mozilla-bmo1580963.patch
 %endif # only_print_mozconfig
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 PreReq:         coreutils fileutils textutils /bin/sh
@@ -269,6 +270,7 @@ fi
 %patch22 -p1
 %patch24 -p1
 %patch25 -p1
+%patch26 -p1
 %endif # only_print_mozconfig
 
 %build
diff --git a/mozilla-bmo1580963.patch b/mozilla-bmo1580963.patch
new file mode 100644
index 0000000..50ae1ab
--- /dev/null
+++ b/mozilla-bmo1580963.patch
@@ -0,0 +1,61 @@
+From 7617a0e6fe2bb7afab6ffda49fc8cd9eca2f035b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
+Date: Thu, 12 Sep 2019 21:09:27 +0000
+Subject: [PATCH] Bug 1580963 - Cherry-pick some servo changes from a rustc
+ upgrade.
+
+This cherry-picks from Servo commit 98e4a53b724.
+
+Differential Revision: https://phabricator.services.mozilla.com/D45738
+
+--HG--
+extra : moz-landing-system : lando
+---
+ .../style/stylesheets/viewport_rule.rs        | 23 +++++++++++++------
+ 1 file changed, 16 insertions(+), 7 deletions(-)
+
+diff --git a/servo/components/style/stylesheets/viewport_rule.rs b/servo/components/style/stylesheets/viewport_rule.rs
+index 8cc858f7a7f69..7d0881e3336a9 100644
+--- old/servo/components/style/stylesheets/viewport_rule.rs
++++ new/servo/components/style/stylesheets/viewport_rule.rs
+@@ -291,15 +291,18 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
+     ) -> Result<Vec<ViewportDescriptorDeclaration>, ParseError<'i>> {
+         macro_rules! declaration {
+             ($declaration:ident($parse:expr)) => {
+-                declaration!($declaration(value: try!($parse(input)),
+-                                          important: input.try(parse_important).is_ok()))
++                declaration!($declaration {
++                    value: $parse(input)?,
++                    important: input.try(parse_important).is_ok(),
++                })
+             };
+-            ($declaration:ident(value: $value:expr, important: $important:expr)) => {
++            ($declaration:ident { value: $value:expr, important: $important:expr, }) => {
+                 ViewportDescriptorDeclaration::new(
+                     self.context.stylesheet_origin,
+                     ViewportDescriptor::$declaration($value),
+-                    $important)
+-            }
++                    $important,
++                )
++            };
+         }
+ 
+         macro_rules! ok {
+@@ -311,8 +314,14 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
+                 let important = input.try(parse_important).is_ok();
+ 
+                 Ok(vec![
+-                    declaration!($min(value: shorthand.0, important: important)),
+-                    declaration!($max(value: shorthand.1, important: important)),
++                    declaration!($min {
++                        value: shorthand.0,
++                        important: important,
++                    }),
++                    declaration!($max {
++                        value: shorthand.1,
++                        important: important,
++                    }),
+                 ])
+             }};
+         }