diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 310c5e7d8af9..a5c2aaabbb21 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22423,7 +22423,7 @@ with pkgs;
   libagar_test = callPackage ../development/libraries/libagar/libagar_test.nix { };
 
   libao = callPackage ../development/libraries/libao {
-    usePulseAudio = config.pulseaudio or lib.meta.availableOn stdenv.hostPlatform libpulseaudio;
+    usePulseAudio = config.pulseaudio or (lib.meta.availableOn stdenv.hostPlatform libpulseaudio);
     inherit (darwin.apple_sdk.frameworks) CoreAudio CoreServices AudioUnit;
   };