diff --git a/src/libsodium/crypto_pwhash/scryptsalsa208sha256/crypto_scrypt.h b/src/libsodium/crypto_pwhash/scryptsalsa208sha256/crypto_scrypt.h
index eee7b8b1..1224c0f1 100644
--- a/src/libsodium/crypto_pwhash/scryptsalsa208sha256/crypto_scrypt.h
+++ b/src/libsodium/crypto_pwhash/scryptsalsa208sha256/crypto_scrypt.h
@@ -34,12 +34,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#if SIZE_MAX > 0xffffffffULL
-#define ARCH_BITS 64
-#else
-#define ARCH_BITS 32
-#endif
-
 #define crypto_pwhash_scryptsalsa208sha256_STRPREFIXBYTES 14
 #define crypto_pwhash_scryptsalsa208sha256_STRSETTINGBYTES 57
 #define crypto_pwhash_scryptsalsa208sha256_STRSALTBYTES 32
diff --git a/src/libsodium/crypto_pwhash/scryptsalsa208sha256/nosse/pwhash_scryptsalsa208sha256_nosse.c b/src/libsodium/crypto_pwhash/scryptsalsa208sha256/nosse/pwhash_scryptsalsa208sha256_nosse.c
index 79483c37..9ecaf52f 100644
--- a/src/libsodium/crypto_pwhash/scryptsalsa208sha256/nosse/pwhash_scryptsalsa208sha256_nosse.c
+++ b/src/libsodium/crypto_pwhash/scryptsalsa208sha256/nosse/pwhash_scryptsalsa208sha256_nosse.c
@@ -49,17 +49,9 @@ blkxor(uint32_t *dest, const uint32_t *src, size_t len)
 {
     size_t i;
 
-#if ARCH_BITS == 32
     for (i = 0; i < len * 16; i++) {
         dest[i] ^= src[i];
     }
-#else
-    uint64_t       *dest_ = (uint64_t *) (void *) dest;
-    const uint64_t *src_  = (const uint64_t *) (const void *) src;
-    for (i = 0; i < len * 8; i++) {
-        dest_[i] ^= src_[i];
-    }
-#endif
 }
 
 /*