diff --git a/tsdb/db.go b/tsdb/db.go
index 001515081d..ccb0fa62bd 100644
--- a/tsdb/db.go
+++ b/tsdb/db.go
@@ -1518,9 +1518,7 @@ func (db *DB) compactBlocks() (err error) {
 		default:
 		}
 
-		db.mtx.RLock()
 		uids, err := db.compactor.Compact(db.dir, plan, db.blocks)
-		db.mtx.RUnlock()
 		if err != nil {
 			return fmt.Errorf("compact %s: %w", plan, err)
 		}