diff --git a/lib/systems/doubles.nix b/lib/systems/doubles.nix
index 6939e9a40c2d..f60c6a8addef 100644
--- a/lib/systems/doubles.nix
+++ b/lib/systems/doubles.nix
@@ -55,7 +55,7 @@ let
     "wasm64-wasi" "wasm32-wasi"
 
     # Windows
-    "x86_64-windows" "i686-windows"
+    "aarch64-windows" "x86_64-windows" "i686-windows"
   ];
 
   allParsed = map parse.mkSystemFromString all;
diff --git a/lib/tests/systems.nix b/lib/tests/systems.nix
index f5e7bdd5b705..3a8054ef4bc8 100644
--- a/lib/tests/systems.nix
+++ b/lib/tests/systems.nix
@@ -60,7 +60,7 @@ lib.runTests (
   testlinux = mseteq linux [ "aarch64-linux" "armv5tel-linux" "armv6l-linux" "armv7a-linux" "armv7l-linux" "i686-linux" "loongarch64-linux" "m68k-linux" "microblaze-linux" "microblazeel-linux" "mips-linux" "mips64-linux" "mips64el-linux" "mipsel-linux" "powerpc64-linux" "powerpc64le-linux" "riscv32-linux" "riscv64-linux" "s390-linux" "s390x-linux" "x86_64-linux" ];
   testnetbsd = mseteq netbsd [ "aarch64-netbsd" "armv6l-netbsd" "armv7a-netbsd" "armv7l-netbsd" "i686-netbsd" "m68k-netbsd" "mipsel-netbsd" "powerpc-netbsd" "riscv32-netbsd" "riscv64-netbsd" "x86_64-netbsd" ];
   testopenbsd = mseteq openbsd [ "i686-openbsd" "x86_64-openbsd" ];
-  testwindows = mseteq windows [ "i686-cygwin" "x86_64-cygwin" "i686-windows" "x86_64-windows" ];
+  testwindows = mseteq windows [ "i686-cygwin" "x86_64-cygwin" "aarch64-windows" "i686-windows" "x86_64-windows" ];
   testunix = mseteq unix (linux ++ darwin ++ freebsd ++ openbsd ++ netbsd ++ illumos ++ cygwin ++ redox);
 })