diff --git a/pkgs/os-specific/darwin/osx-private-sdk/default.nix b/pkgs/os-specific/darwin/osx-private-sdk/default.nix
index 1eecdbc5618d..115512a6febd 100644
--- a/pkgs/os-specific/darwin/osx-private-sdk/default.nix
+++ b/pkgs/os-specific/darwin/osx-private-sdk/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation {
     sha256 = "0bv0884yxpvk2ishxj8gdy1w6wb0gwfq55q5qjp0s8z0z7f63zqh";
   };
 
-  # NOTE: we install only headers that are really needed to keep closure sie
+  # NOTE: we install only headers that are really needed to keep closure size
   # reasonable.
   installPhase = ''
     mkdir -p $out/include