diff --git a/pkgs/by-name/op/openh264/package.nix b/pkgs/by-name/op/openh264/package.nix
index 18766f628c124..a8a74377e4ffb 100644
--- a/pkgs/by-name/op/openh264/package.nix
+++ b/pkgs/by-name/op/openh264/package.nix
@@ -22,6 +22,10 @@ stdenv.mkDerivation (finalAttrs: {
 
   outputs = [ "out" "dev" ];
 
+  postPatch = ''
+    substituteInPlace meson.build --replace-fail "'-Werror'," ""
+  '';
+
   nativeBuildInputs = [
     meson
     nasm