diff --git a/pkgs/applications/editors/emacs-24/macport-24.5.nix b/pkgs/applications/editors/emacs-24/macport-24.5.nix
index 23133ec262c..885538dc883 100644
--- a/pkgs/applications/editors/emacs-24/macport-24.5.nix
+++ b/pkgs/applications/editors/emacs-24/macport-24.5.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation rec {
     "--enable-mac-app=$$out/Applications"
   ];
 
-  CFLAGS = "-O3";
+  CFLAGS = "-O3 -DMAC_OS_X_VERSION_MAX_ALLOWED=1090";
   LDFLAGS = "-O3 -L${ncurses.out}/lib";
 
   postInstall = ''