diff --git a/third_party/zlib/BUILD.gn b/third_party/zlib/BUILD.gn
index 92069a57..9c243979 100644
--- a/third_party/zlib/BUILD.gn
+++ b/third_party/zlib/BUILD.gn
@@ -103,12 +103,6 @@ if (zlib_source == "external") {
         "/wd4324",  # structure was padded due to alignment specifier
         "/wd4702",  # unreachable code
       ]
-      if (current_cpu == "arm64" && !crashpad_is_clang) {
-        # Select code path for clang in zlib to avoid using MSVC x86/x64
-        # intrinsics for Windows ARM64.
-        # TODO: https://crashpad.chromium.org/bug/267
-        defines += [ "__clang__" ]
-      }
     } else {
       defines += [
         "HAVE_HIDDEN",