diff --git a/pkgs/by-name/xm/xml-security-c/package.nix b/pkgs/by-name/xm/xml-security-c/package.nix
index 74be5b66d8aa..e2c30a920d5c 100644
--- a/pkgs/by-name/xm/xml-security-c/package.nix
+++ b/pkgs/by-name/xm/xml-security-c/package.nix
@@ -27,6 +27,8 @@ stdenv.mkDerivation (finalAttrs: {
     "--with-xalan"
   ];
 
+  env.CXXFLAGS = "-std=gnu++17";
+
   nativeBuildInputs = [
     autoreconfHook
     pkg-config