diff --git a/src/option_parser.cpp b/src/option_parser.cpp
index 0a40c6ca..6fdc0cd1 100644
--- a/src/option_parser.cpp
+++ b/src/option_parser.cpp
@@ -53,6 +53,13 @@ enum
     MERGERFS_OPT_VERSION
   };
 
+struct OptsState
+{
+  std::vector<
+};
+
+
+
 
 static
 void