diff --git a/lib/sdk/writer/checksum-stream.js b/lib/sdk/writer/checksum-stream.js
index d93c01ad..16f0c769 100644
--- a/lib/sdk/writer/checksum-stream.js
+++ b/lib/sdk/writer/checksum-stream.js
@@ -72,7 +72,7 @@ class ChecksumStream extends stream.Transform {
     if (algorithm === 'xxhash') {
       // Seed value 0x45544348 = ASCII "ETCH"
       const seed = 0x45544348
-      const is64Bit = process.arch === 'x64' || process.arch === 'aarch64'
+      const is64Bit = [ 'x64', 'arm64', 'ppc64' ].includes(process.arch)
       hash = new xxhash.Stream(seed, is64Bit ? 64 : 32, Buffer.allocUnsafe(is64Bit ? 8 : 4))
     } else {
       hash = _.attempt(crypto.createHash, algorithm)