diff --git a/pkgs/os-specific/linux/sgx/azure-dcap-client/default.nix b/pkgs/os-specific/linux/sgx/azure-dcap-client/default.nix
index cd3d2f94d6f3..0ee191e86895 100644
--- a/pkgs/os-specific/linux/sgx/azure-dcap-client/default.nix
+++ b/pkgs/os-specific/linux/sgx/azure-dcap-client/default.nix
@@ -1,5 +1,6 @@
 { stdenv
 , fetchFromGitHub
+, fetchpatch
 , lib
 , curl
 , nlohmann_json
@@ -43,6 +44,16 @@ stdenv.mkDerivation rec {
     hash = "sha256-q0dI4WdA1ue4sw+QfSherh31Ldf9gnhoft66o3E9gnU=";
   };
 
+  patches = [
+    # Fix gcc-13 build:
+    #   https://github.com/microsoft/Azure-DCAP-Client/pull/197
+    (fetchpatch {
+      name = "gcc-13.patch";
+      url = "https://github.com/microsoft/Azure-DCAP-Client/commit/fbcae7b3c8f1155998248cf5b5f4c1df979483f5.patch";
+      hash = "sha256-ezEuQql3stn58N1ZPKMlhPpUOBkDpCcENpGwFAmWtHc=";
+    })
+  ];
+
   nativeBuildInputs = [
     pkg-config
   ];
diff --git a/pkgs/os-specific/linux/sgx/azure-dcap-client/test-suite.nix b/pkgs/os-specific/linux/sgx/azure-dcap-client/test-suite.nix
index 1e4432ecc642..40d80ece8abf 100644
--- a/pkgs/os-specific/linux/sgx/azure-dcap-client/test-suite.nix
+++ b/pkgs/os-specific/linux/sgx/azure-dcap-client/test-suite.nix
@@ -9,7 +9,7 @@ sgx-azure-dcap-client.overrideAttrs (old: {
     gtest
   ];
 
-  patches = [
+  patches = (old.patches or []) ++ [
     ./tests-missing-includes.patch
   ];