diff --git a/pkgs/by-name/fr/freecad/package.nix b/pkgs/by-name/fr/freecad/package.nix
index 384a2fd97d8fe..926876295c45b 100644
--- a/pkgs/by-name/fr/freecad/package.nix
+++ b/pkgs/by-name/fr/freecad/package.nix
@@ -119,11 +119,15 @@ freecad-utils.makeCustomizable (
         url = "https://github.com/FreeCAD/FreeCAD/commit/8e04c0a3dd9435df0c2dec813b17d02f7b723b19.patch?full_index=1";
         hash = "sha256-H6WbJFTY5/IqEdoi5N+7D4A6pVAmZR4D+SqDglwS18c=";
       })
+      # https://github.com/FreeCAD/FreeCAD/pull/22221
+      (fetchpatch {
+        url = "https://github.com/FreeCAD/FreeCAD/commit/3d2b7dc9c7ac898b30fe469b7cbd424ed1bca0a2.patch?full_index=1";
+        hash = "sha256-XCQdv/+dYdJ/ptA2VKrD63qYILyaP276ISMkmWLtT30=";
+      })
     ];
 
     cmakeFlags = [
       "-Wno-dev" # turns off warnings which otherwise makes it hard to see what is going on
-      "-DBUILD_FLAT_MESH:BOOL=ON"
       "-DBUILD_DRAWING=ON"
       "-DBUILD_FLAT_MESH:BOOL=ON"
       "-DINSTALL_TO_SITEPACKAGES=OFF"