diff --git a/components/tc_bus/protocol.cpp b/components/tc_bus/protocol.cpp
index 6852f6b..e869d10 100644
--- a/components/tc_bus/protocol.cpp
+++ b/components/tc_bus/protocol.cpp
@@ -341,7 +341,7 @@ namespace esphome
             return data;
         }
 
-        CommandType string_to_command_type(const std::string& str)
+        CommandType string_to_command_type(std::string str)
         {
             if (str == "DOOR_CALL") return COMMAND_TYPE_DOOR_CALL;
             if (str == "FLOOR_CALL") return COMMAND_TYPE_FLOOR_CALL;
diff --git a/components/tc_bus/protocol.h b/components/tc_bus/protocol.h
index f658414..01d0cc5 100644
--- a/components/tc_bus/protocol.h
+++ b/components/tc_bus/protocol.h
@@ -49,7 +49,7 @@ namespace esphome
         CommandData parseCommand(uint32_t command);
 
         const char* command_type_to_string(CommandType type);
-        const CommandType* string_to_command_type(std::string type);
+        const CommandType string_to_command_type(std::string str);
 
     }  // namespace tc_bus
 }  // namespace esphome
\ No newline at end of file