diff --git a/src/libratbag.h b/src/libratbag.h
index 85e2ea10..7fb0383b 100644
--- a/src/libratbag.h
+++ b/src/libratbag.h
@@ -426,6 +426,8 @@ enum ratbag_button_type {
 	RATBAG_BUTTON_TYPE_RIGHT,
 	RATBAG_BUTTON_TYPE_THUMB,
 	RATBAG_BUTTON_TYPE_THUMB2,
+	RATBAG_BUTTON_TYPE_THUMB3,
+	RATBAG_BUTTON_TYPE_THUMB4,
 	RATBAG_BUTTON_TYPE_WHEEL_LEFT,
 	RATBAG_BUTTON_TYPE_WHEEL_RIGHT,
 	RATBAG_BUTTON_TYPE_WHEEL_CLICK, /* FIXME: same as middle click? */
diff --git a/tools/ratbag-command.c b/tools/ratbag-command.c
index 96940bcd..be79cfeb 100644
--- a/tools/ratbag-command.c
+++ b/tools/ratbag-command.c
@@ -136,6 +136,8 @@ button_type_to_str(enum ratbag_button_type type)
 	case RATBAG_BUTTON_TYPE_RIGHT:		str = "right"; break;
 	case RATBAG_BUTTON_TYPE_THUMB:		str = "thumb"; break;
 	case RATBAG_BUTTON_TYPE_THUMB2:		str = "thumb2"; break;
+	case RATBAG_BUTTON_TYPE_THUMB3:		str = "thumb3"; break;
+	case RATBAG_BUTTON_TYPE_THUMB4:		str = "thumb4"; break;
 	case RATBAG_BUTTON_TYPE_WHEEL_LEFT:	str = "wheel left"; break;
 	case RATBAG_BUTTON_TYPE_WHEEL_RIGHT:	str = "wheel right"; break;
 	case RATBAG_BUTTON_TYPE_WHEEL_CLICK:	str = "wheel click"; break;