diff --git a/core/input/gamepad_device.h b/core/input/gamepad_device.h
index 7304876d3..4883acae4 100644
--- a/core/input/gamepad_device.h
+++ b/core/input/gamepad_device.h
@@ -76,7 +76,7 @@ protected:
 	bool is_detecting_input() { return _input_detected != nullptr; }
 
 	std::string _name;
-	std::string _unique_id = "";
+	std::string _unique_id;
 	std::shared_ptr<InputMapping> input_mapper;
 	std::map<u32, int> axis_min_values;
 	std::map<u32, unsigned int> axis_ranges;