diff --git a/src/system/kernel/cache/block_cache.cpp b/src/system/kernel/cache/block_cache.cpp
index 75082b0c1d..5553f00694 100644
--- a/src/system/kernel/cache/block_cache.cpp
+++ b/src/system/kernel/cache/block_cache.cpp
@@ -2590,7 +2590,7 @@ cache_sync_transaction(void* _cache, int32 id)
 			// write back all of their remaining dirty blocks
 			T(Action("sync", cache, transaction));
 			while (transaction->num_blocks > 0) {
-				BlockWriter writer(cache, transaction->num_blocks);
+				BlockWriter writer(cache, false);
 				block_list::Iterator iterator
 					= transaction->blocks.GetIterator();