diff --git a/pkgs/by-name/ou/outils/package.nix b/pkgs/by-name/ou/outils/package.nix
index a133d68e30c8..416bfc9abac9 100644
--- a/pkgs/by-name/ou/outils/package.nix
+++ b/pkgs/by-name/ou/outils/package.nix
@@ -1,6 +1,7 @@
 {
   stdenv,
   fetchFromGitHub,
+  fetchpatch2,
   lib,
 }:
 
@@ -15,6 +16,14 @@ stdenv.mkDerivation rec {
     hash = "sha256-FokJytwQsbGsryBzyglpb1Hg3wti/CPQTOfIGIz9ThA=";
   };
 
+  patches = [
+    (fetchpatch2 {
+      url = "https://github.com/leahneukirchen/outils/commit/50877e1bf7c905044e0b50b227ecff48cfec394b.patch?full_index=1";
+      name = "outils-add-recallocarray-prototype.patch";
+      hash = "sha256-jOnCMPcHKMRR3J0Yh+ZTHAn7P85FO80yXVX0K2vtlVk=";
+    })
+  ];
+
   makeFlags = [ "PREFIX=$(out)" ];
 
   meta = with lib; {