diff --git a/src/option_parser.cpp b/src/option_parser.cpp
index 4d4a0d1e..d703d21a 100644
--- a/src/option_parser.cpp
+++ b/src/option_parser.cpp
@@ -164,7 +164,7 @@ _process_branches(const char *arg_)
   if(rv < 0)
     cfg.errs.push_back({-rv,"branches="+arg});
 
-  return 0;
+  return OPT_DISCARD;
 }
 
 static