diff --git a/core/filtermaps/filtermaps.go b/core/filtermaps/filtermaps.go
index 685fc12dec..c8389323c0 100644
--- a/core/filtermaps/filtermaps.go
+++ b/core/filtermaps/filtermaps.go
@@ -223,7 +223,8 @@ func (f *FilterMaps) Start() {
 			log.Error("Could not load head filter map snapshot", "error", err)
 		}
 	}
-	f.closeWg.Add(1)
+	f.closeWg.Add(2)
+	go f.removeBloomBits()
 	go f.indexerLoop()
 }
 
@@ -318,6 +319,13 @@ func (f *FilterMaps) init() error {
 	return batch.Write()
 }
 
+// removeBloomBits removes old bloom bits data from the database.
+func (f *FilterMaps) removeBloomBits() {
+	f.removeDbWithPrefix(rawdb.BloomBitsPrefix, "Removing old bloom bits database")
+	f.removeDbWithPrefix(rawdb.BloomBitsIndexPrefix, "Removing old bloom bits chain index")
+	f.closeWg.Done()
+}
+
 // removeDbWithPrefix removes data with the given prefix from the database and
 // returns true if everything was successfully removed.
 func (f *FilterMaps) removeDbWithPrefix(prefix []byte, action string) bool {
diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
index fc18c7e4e9..57f877ddcc 100644
--- a/core/rawdb/schema.go
+++ b/core/rawdb/schema.go
@@ -106,7 +106,7 @@ var (
 	blockReceiptsPrefix = []byte("r") // blockReceiptsPrefix + num (uint64 big endian) + hash -> block receipts
 
 	txLookupPrefix        = []byte("l") // txLookupPrefix + hash -> transaction/receipt lookup metadata
-	bloomBitsPrefix       = []byte("B") // bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash -> bloom bits
+	BloomBitsPrefix       = []byte("B") // BloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash -> bloom bits
 	SnapshotAccountPrefix = []byte("a") // SnapshotAccountPrefix + account hash -> account trie value
 	SnapshotStoragePrefix = []byte("o") // SnapshotStoragePrefix + account hash + storage hash -> storage trie value
 	CodePrefix            = []byte("c") // CodePrefix + code hash -> account code