diff --git a/src/option_parser.cpp b/src/option_parser.cpp
index e41e5e99..ea3b2fe6 100644
--- a/src/option_parser.cpp
+++ b/src/option_parser.cpp
@@ -57,6 +57,7 @@ struct OptParseState
 {
   std::vector<std::string> opts;
   std::vector<std::string> branches;
+  Config::ErrVec errs;
 };
 
 static