diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 4ebadc25..a3d69a19 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -178,11 +178,12 @@ tp_detect_wobbling(struct tp_dispatch *tp,
 		return;
 	}
 
-	t->hysteresis.x_motion_history <<= 1;
+	t->hysteresis.x_motion_history >>= 1;
 	if (dx > 0) { /* right move */
 		static const char r_l_r = 0x5; /* {Right, Left, Right} */
 
-		t->hysteresis.x_motion_history |= 0x1;
+
+		t->hysteresis.x_motion_history |= (1 << 2);
 		if (t->hysteresis.x_motion_history == r_l_r) {
 			tp->hysteresis.enabled = true;
 			evdev_log_debug(tp->device, "hysteresis enabled\n");