diff --git a/src/system/kernel/cache/block_cache.cpp b/src/system/kernel/cache/block_cache.cpp
index 5743d80e20..4bbbb7049e 100644
--- a/src/system/kernel/cache/block_cache.cpp
+++ b/src/system/kernel/cache/block_cache.cpp
@@ -803,6 +803,7 @@ cache_transaction::cache_transaction()
 	sub_num_blocks = 0;
 	first_block = NULL;
 	open = true;
+	has_sub_transaction = false;
 	last_used = system_time();
 }