diff --git a/pkgs/by-name/un/untie/add-define-gnu-source.patch b/pkgs/by-name/un/untie/add-define-gnu-source.patch
new file mode 100644
index 000000000000..aaaf99149e31
--- /dev/null
+++ b/pkgs/by-name/un/untie/add-define-gnu-source.patch
@@ -0,0 +1,12 @@
+diff --git a/untie.c b/untie.c
+index f08a10d..d3d20b4 100644
+--- a/untie.c
++++ b/untie.c
+@@ -18,6 +18,7 @@
+  * Copyright (c) 2006, 2007 Guillaume Chazarain <guichaz@yahoo.fr>
+  */
+ 
++#define _GNU_SOURCE
+ #include <sys/time.h>
+ #include <sys/resource.h>
+ #include <sys/wait.h>
diff --git a/pkgs/by-name/un/untie/package.nix b/pkgs/by-name/un/untie/package.nix
index 9dee6d7e422d..2bb38695f509 100644
--- a/pkgs/by-name/un/untie/package.nix
+++ b/pkgs/by-name/un/untie/package.nix
@@ -12,6 +12,11 @@ stdenv.mkDerivation rec {
     sha256 = "1334ngvbi4arcch462mzi5vxvxck4sy1nf0m58116d9xmx83ak0m";
   };
 
+  patches = [
+    # fix build with gcc14
+    ./add-define-gnu-source.patch
+  ];
+
   makeFlags = [ "PREFIX=$(out)" ];
 
   meta = with lib; {