diff --git a/pkgs/by-name/x2/x264/package.nix b/pkgs/by-name/x2/x264/package.nix
index 48852d9215b0..7e209794f89b 100644
--- a/pkgs/by-name/x2/x264/package.nix
+++ b/pkgs/by-name/x2/x264/package.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
       # `AS' is set to the binutils assembler, but we need nasm
       unset AS
     ''
-    + lib.optionalString stdenv.hostPlatform.isAarch ''
+    + lib.optionalString (stdenv.hostPlatform.isAarch || stdenv.hostPlatform.isLoongArch64) ''
       export AS=$CC
     '';