Index: subversion/libsvn_fs_fs/tree.c
===================================================================
--- subversion/libsvn_fs_fs/tree.c	(revision 1494562)
+++ subversion/libsvn_fs_fs/tree.c	(working copy)
@@ -353,8 +353,11 @@
 
   /* need to do a full lookup.  Calculate the hash value
      (HASH_VALUE has been initialized to REVISION). */
+
+#ifdef SVN_UNALIGNED_ACCESS_IS_OK
   for (i = 0; i + 4 <= path_len; i += 4)
     hash_value = hash_value * 0xd1f3da69 + *(const apr_uint32_t*)(path + i);
+#endif
 
   for (; i < path_len; ++i)
     hash_value = hash_value * 33 + path[i];