diff --git a/core/database_util.go b/core/database_util.go
index c4b50e5d8ab8..477be0f0ed74 100644
--- a/core/database_util.go
+++ b/core/database_util.go
@@ -35,10 +35,6 @@ import (
 )
 
 var (
-	headHeaderKey = []byte("LastHeader")
-	headBlockKey  = []byte("LastBlock")
-	headFastKey   = []byte("LastFast")
-	trieSyncKey   = []byte("TrieSync")
 
 	// Data item prefixes (use single byte to avoid mixing data types, avoid `i`).
 	headerPrefix        = []byte("h") // headerPrefix + num (uint64 big endian) + hash -> header
diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
index a0a1852c7550..2fbb17d31a86 100644
--- a/core/rawdb/schema.go
+++ b/core/rawdb/schema.go
@@ -34,6 +34,7 @@ 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