diff --git a/pkgs/development/libraries/x264/default.nix b/pkgs/development/libraries/x264/default.nix
index da343016f33..e5ca1fc58ed 100644
--- a/pkgs/development/libraries/x264/default.nix
+++ b/pkgs/development/libraries/x264/default.nix
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   outputs = [ "out" "lib" "dev" ];
 
-  preConfigure = lib.optionalString (stdenv.buildPlatform.isx86_64 || stdenv.hostPlatform.isi686) ''
+  preConfigure = lib.optionalString stdenv.hostPlatform.isx86 ''
     # `AS' is set to the binutils assembler, but we need nasm
     unset AS
   '' + lib.optionalString stdenv.hostPlatform.isAarch ''