Index: subversion/libsvn_fs_fs/fs.c
===================================================================
--- subversion/libsvn_fs_fs/fs.c	(revision 1568806)
+++ subversion/libsvn_fs_fs/fs.c	(working copy)
@@ -103,8 +103,10 @@ fs_serialized_init(svn_fs_t *fs, apr_pool_t *commo
       SVN_ERR(svn_mutex__init(&ffsd->txn_current_lock,
                               SVN_FS_FS__USE_LOCK_MUTEX, common_pool));
 
-      SVN_ERR(svn_mutex__init(&ffsd->txn_list_lock,
-                              SVN_FS_FS__USE_LOCK_MUTEX, common_pool));
+      /* We also need a mutex for synchronizing access to the active
+         transaction list and free transaction pointer.  This one is
+         enabled unconditionally. */
+      SVN_ERR(svn_mutex__init(&ffsd->txn_list_lock, TRUE, common_pool));
 
       key = apr_pstrdup(common_pool, key);
       status = apr_pool_userdata_set(ffsd, key, NULL, common_pool);