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-rw-r--r--src/option_manager.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/option_manager.cc b/src/option_manager.cc
index efbcf1db..de16cf24 100644
--- a/src/option_manager.cc
+++ b/src/option_manager.cc
@@ -43,7 +43,7 @@ void OptionManager::unregister_watcher(OptionManagerWatcher& watcher) const
struct option_not_found : public runtime_error
{
option_not_found(StringView name)
- : runtime_error("option not found: " + name) {}
+ : runtime_error(format("option not found: '{}'. Use declare-option first", name)) {}
};
Option& OptionManager::get_local_option(StringView name)