diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for the hashes package
 
+## 0.2.2.1 -- 2022-09-28
+
+*   Support for Apple Silicon (`aarch64_HOST_ARCH`)
+
 ## 0.2.2.0 -- 2022-08-20
 
 *   Test suite for SHA hash functions
diff --git a/hashes.cabal b/hashes.cabal
--- a/hashes.cabal
+++ b/hashes.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.4
 name: hashes
-version: 0.2.2.0
+version: 0.2.2.1
 synopsis: Hash functions
 Description: Efficient implementations of hash functions
 homepage: https://github.com/larskuhtz/hs-hashes
diff --git a/src/Data/Hash/FNV1.hs b/src/Data/Hash/FNV1.hs
--- a/src/Data/Hash/FNV1.hs
+++ b/src/Data/Hash/FNV1.hs
@@ -366,7 +366,7 @@
 {-# INLINE fnvOffsetBasis64 #-}
 
 fnvPrime :: Word
-#if defined(x86_64_HOST_ARCH)
+#if defined(x86_64_HOST_ARCH) || defined(aarch64_HOST_ARCH)
 fnvPrime = fromIntegral fnvPrime64
 #elif defined(i386_HOST_ARCH)
 fnvPrime = fromIntegral fvnPrime32
@@ -376,7 +376,7 @@
 {-# INLINE fnvPrime #-}
 
 fnvOffsetBasis :: Word
-#if defined(x86_64_HOST_ARCH)
+#if defined(x86_64_HOST_ARCH) || defined(aarch64_HOST_ARCH)
 fnvOffsetBasis = fromIntegral fnvOffsetBasis64
 #elif defined(i386_HOST_ARCH)
 fnvOffsetBasis = fromIntegral fnvOffsetBasis32
diff --git a/test/Test/Data/Hash/FNV1.hs b/test/Test/Data/Hash/FNV1.hs
--- a/test/Test/Data/Hash/FNV1.hs
+++ b/test/Test/Data/Hash/FNV1.hs
@@ -460,7 +460,7 @@
 testZeroPrim b = primitiveFnv1 b == 0
 
 testVectorsPrim :: [(B.ByteString, Word)]
-#if defined(x86_64_HOST_ARCH)
+#if defined(x86_64_HOST_ARCH) || defined(aarch64_HOST_ARCH)
 testVectorsPrim = second fromIntegral <$> testVectors64
 #elif defined(i386_HOST_ARCH)
 testVectorsPrim = second fromIntegral <$> testVectors32
@@ -469,7 +469,7 @@
 #endif
 
 zerosPrim :: [B.ByteString]
-#if defined(x86_64_HOST_ARCH)
+#if defined(x86_64_HOST_ARCH) || defined(aarch64_HOST_ARCH)
 zerosPrim = zeros64
 #elif defined(i386_HOST_ARCH)
 zerosPrim = zeros32
@@ -503,14 +503,14 @@
 testZeroPrima b = primitiveFnv1a b == 0
 
 testVectorsPrima :: [(B.ByteString, Word)]
-#if defined(x86_64_HOST_ARCH)
+#if defined(x86_64_HOST_ARCH) || defined(aarch64_HOST_ARCH)
 testVectorsPrima = second fromIntegral <$> testVectors64a
 #elif defined(i386_HOST_ARCH)
 testVectorsPrima = second fromIntegral <$> testVectors32a
 #endif
 
 zerosPrima :: [B.ByteString]
-#if defined(x86_64_HOST_ARCH)
+#if defined(x86_64_HOST_ARCH) || defined(aarch64_HOST_ARCH)
 zerosPrima = zeros64a
 #elif defined(i386_HOST_ARCH)
 zerosPrima = zeros32a