diff --git a/Formula/pacparser.rb b/Formula/pacparser.rb
index 63054c6b96cbe..4d918526fe7a9 100644
--- a/Formula/pacparser.rb
+++ b/Formula/pacparser.rb
@@ -3,7 +3,7 @@ class Pacparser < Formula
   homepage "https://github.com/pacparser/pacparser"
   url "https://github.com/pacparser/pacparser/archive/1.3.7.tar.gz"
   sha256 "575c5d8096b4c842b2af852bbb8bcfde96170b28b49f33249dbe2057a8beea13"
-  license "LGPL-3.0"
+  license "LGPL-3.0-or-later"
   head "https://github.com/pacparser/pacparser.git"
 
   bottle do
@@ -16,6 +16,12 @@ class Pacparser < Formula
     sha256 "719e5eadacf71e3a2e863447609322c45f3be3a9d3ee63373c05a9a2ae7f31b8" => :sierra
   end
 
+  # Fix build for MacOS 11.1
+  patch do
+    url "https://github.com/manugarg/pacparser/commit/28afea85c7578d033132f3817b62d3bb707cc3a3.patch?full_index=1"
+    sha256 "52fc5b276caf6e95a3ae4ac21e75c9751daaf429f344fdc6b62c85de4aa40d48"
+  end
+
   def install
     # Disable parallel build due to upstream concurrency issue.
     # https://github.com/pacparser/pacparser/issues/27