diff --git a/wallet/config.go b/wallet/config.go
index afea09f..1e581ac 100644
--- a/wallet/config.go
+++ b/wallet/config.go
@@ -16,6 +16,7 @@ type (
 		Log *zap.Logger
 	}
 
+	// An Option is a configuration option for a wallet.
 	Option func(*config)
 )