diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
index e61d05339070..be34d14b4d11 100644
--- a/core/rawdb/schema.go
+++ b/core/rawdb/schema.go
@@ -35,6 +35,8 @@ var (
 	// headFastBlockKey tracks the latest known incomplete block's hash during fast sync.
 	headFastBlockKey = []byte("LastFast")
 
+	trieSyncKey = []byte("TrieSync")
+
 	// Data item prefixes (use single byte to avoid mixing data types, avoid `i`, used for indexes).
 	headerPrefix       = []byte("h") // headerPrefix + num (uint64 big endian) + hash -> header
 	headerTDSuffix     = []byte("t") // headerPrefix + num (uint64 big endian) + hash + headerTDSuffix -> td