diff --git a/pkgs/by-name/te/tenacity/cstdlib.patch b/pkgs/by-name/te/tenacity/cstdlib.patch
new file mode 100644
index 000000000000..ed74657c8a97
--- /dev/null
+++ b/pkgs/by-name/te/tenacity/cstdlib.patch
@@ -0,0 +1,26 @@
+From f523f6a4272910417da6d8f02597a560a9c594e4 Mon Sep 17 00:00:00 2001
+From: Ethan Carter Edwards <ethan@ethancedwards.com>
+Date: Wed, 31 Dec 2025 21:17:39 -0500
+Subject: [PATCH] fix compilation for gcc 15
+
+Link: https://github.com/NixOS/nixpkgs/issues/475574
+
+Signed-off-by: Ethan Carter Edwards <ethan@ethancedwards.com>
+---
+ libraries/lib-utility/MemoryX.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/libraries/lib-utility/MemoryX.h b/libraries/lib-utility/MemoryX.h
+index 2c96af17b..58bf67127 100644
+--- a/libraries/lib-utility/MemoryX.h
++++ b/libraries/lib-utility/MemoryX.h
+@@ -5,6 +5,7 @@
+ #include <iterator>
+ #include <memory>
+ #include <new> // align_val_t and hardware_destructive_interference_size
+ #include <cstdlib> // Needed for free.
++#include <cstdint>
+ #ifndef safenew
+ #define safenew new
+-- 
+2.47.3
diff --git a/pkgs/by-name/te/tenacity/package.nix b/pkgs/by-name/te/tenacity/package.nix
index 3636dc9342ee..4af8231506fb 100644
--- a/pkgs/by-name/te/tenacity/package.nix
+++ b/pkgs/by-name/te/tenacity/package.nix
@@ -61,6 +61,12 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-2gndOwgEJK2zDSbjcZigbhEpGv301/ygrf+EQhKp8PI=";
   };
 
+  # https://codeberg.org/tenacityteam/tenacity/pulls/696
+  # can be removed at next version bump
+  patches = [
+    ./cstdlib.patch
+  ];
+
   postPatch = ''
     # GIT_DESCRIBE is used for the version string and can't be passed in
     # as an option, so we substitute it instead.