diff --git a/sys/dev/atkbdc/psm.c b/sys/dev/atkbdc/psm.c
index b010182be6b4..5a7779a79f43 100644
--- a/sys/dev/atkbdc/psm.c
+++ b/sys/dev/atkbdc/psm.c
@@ -5032,7 +5032,7 @@ psmsoftintr(void *arg)
 		case MOUSE_MODEL_GLIDEPOINT:
 			/* `tapping' action */
 			ms.button |= ((c & MOUSE_PS2_TAP)) ? 0 :
-			    MOUSE_BUTTON4DOWN;
+			    MOUSE_BUTTON1DOWN;
 			break;
 
 		case MOUSE_MODEL_NETSCROLL: