diff --git a/src/rime/switches.cc b/src/rime/switches.cc
index d7406b884..e6ab00795 100644
--- a/src/rime/switches.cc
+++ b/src/rime/switches.cc
@@ -114,6 +114,7 @@ Switches::SwitchOption Switches::Reset(const SwitchOption& current) {
       default_state,
     };
   }
+  return {};
 }
 
 Switches::SwitchOption Switches::FindRadioGroupOption(