diff --git a/options/db_options.h b/options/db_options.h
index 4c2589a735..433c7473b6 100644
--- a/options/db_options.h
+++ b/options/db_options.h
@@ -115,6 +115,7 @@ struct ImmutableDBOptions {
 struct MutableDBOptions {
   static const char* kName() { return "MutableDBOptions"; }
   MutableDBOptions();
+  MutableDBOptions(const MutableDBOptions&) = default;
   explicit MutableDBOptions(const DBOptions& options);
 
   MutableDBOptions& operator=(const MutableDBOptions&) = default;