diff --git a/src/add-ons/input_server/devices/serial_mouse/SerialMouse.h b/src/add-ons/input_server/devices/serial_mouse/SerialMouse.h
index cb64dff3d1..0a5e13e41c 100644
--- a/src/add-ons/input_server/devices/serial_mouse/SerialMouse.h
+++ b/src/add-ons/input_server/devices/serial_mouse/SerialMouse.h
@@ -3,7 +3,7 @@
 
 #include <keyboard_mouse_driver.h>
 
-typedef enum mouse_id {
+enum mouse_id {
 	kNoDevice		= -2,
 	kUnknown		= -1,	// Something there, but can't recognize it yet.
 	kNotSet			=  0,