diff --git a/db/tailing_iter.h b/db/tailing_iter.h
index 1387387754..7ae8f9d9b1 100644
--- a/db/tailing_iter.h
+++ b/db/tailing_iter.h
@@ -14,7 +14,7 @@ namespace rocksdb {
 
 class DBImpl;
 class Env;
-class SuperVersion;
+struct SuperVersion;
 class ColumnFamilyData;
 
 /**