diff --git a/db/c.cc b/db/c.cc
index c556f3eee9..b03bf9ad8e 100644
--- a/db/c.cc
+++ b/db/c.cc
@@ -2959,6 +2959,8 @@ void rocksdb_options_set_access_hint_on_compaction_start(
       opt->rep.access_hint_on_compaction_start =
           ROCKSDB_NAMESPACE::Options::WILLNEED;
       break;
+    default:
+      assert(0);
   }
 }