diff --git a/zimlib-fix-flags.patch b/zimlib-fix-flags.patch
deleted file mode 100644
index 63a16b0..0000000
--- a/zimlib-fix-flags.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-From f28658b6dd722e548e93f5d45a03ac7c8d078501 Mon Sep 17 00:00:00 2001
-From: Vitaly Zaitsev <vitaly@easycoding.org>
-Date: Wed, 10 Apr 2019 14:57:47 +0200
-Subject: [PATCH 2/2] Removed Werror build flag.
-
----
- meson.build | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/meson.build b/meson.build
-index 2d38684..42e5253 100644
---- a/meson.build
-+++ b/meson.build
-@@ -1,7 +1,7 @@
- project('libzim', ['c', 'cpp'],
-   version : '4.0.6',
-   license : 'GPL2',
--  default_options : ['c_std=c11', 'cpp_std=c++11', 'werror=true'])
-+  default_options : ['c_std=c11', 'cpp_std=c++11'])
- 
- if build_machine.system() != 'windows'
-   add_project_arguments('-D_LARGEFILE64_SOURCE=1', '-D_FILE_OFFSET_BITS=64', language: 'cpp')
--- 
-2.20.1
-
diff --git a/zimlib.spec b/zimlib.spec
index 5b766d1..6e7d5db 100644
--- a/zimlib.spec
+++ b/zimlib.spec
@@ -9,7 +9,6 @@ Summary: Reference implementation of the ZIM specification
 
 URL: https://github.com/openzim/%{appname}
 Source0: %{url}/archive/%{version}.tar.gz
-Patch0: %{name}-fix-flags.patch
 
 BuildRequires: xapian-core-devel
 BuildRequires: libicu-devel
@@ -35,6 +34,7 @@ Requires: %{name}%{?_isa} = %{?epoch:%{epoch}:}%{version}-%{release}
 
 %prep
 %autosetup -n %{appname}-%{version} -p1
+sed -e "s/, 'werror=true'//" -i meson.build
 
 %build
 %meson