diff --git a/src/syncterm/term.c b/src/syncterm/term.c
index 43de331d48b7ba050f50415523c54a4d5c66c889..713cd12dcbe191fef37c5a0b5efbfaf33de14036 100644
--- a/src/syncterm/term.c
+++ b/src/syncterm/term.c
@@ -138,8 +138,6 @@ void setup_mouse_events(struct mouse_state *ms)
 	ciomouse_addevent(CIOLIB_BUTTON_1_DRAG_END);
 	ciomouse_addevent(CIOLIB_BUTTON_2_CLICK);
 	ciomouse_addevent(CIOLIB_BUTTON_3_CLICK);
-	ciomouse_addevent(CIOLIB_BUTTON_4_PRESS);
-	ciomouse_addevent(CIOLIB_BUTTON_5_PRESS);
 }
 
 #if defined(__BORLANDC__)