diff --git a/sys/dev/atkbdc/psm.c b/sys/dev/atkbdc/psm.c
index 6c4947aeeeef..34f29f7c62f8 100644
--- a/sys/dev/atkbdc/psm.c
+++ b/sys/dev/atkbdc/psm.c
@@ -4676,7 +4676,7 @@ proc_elantech(struct psm_softc *sc, packetbuf_t *pb, mousestatus_t *ms,
 	case ELANTECH_PKT_TRACKPOINT:
 		/*               7   6   5   4   3   2   1   0 (LSB)
 		 * -------------------------------------------
-		 * ipacket[0]:   0   0  SX  SY   0   M   R   L
+		 * ipacket[0]:   0   0  SY  SX   0   M   R   L
 		 * ipacket[1]: ~SX   0   0   0   0   0   0   0
 		 * ipacket[2]: ~SY   0   0   0   0   0   0   0
 		 * ipacket[3]:   0   0 ~SY ~SX   0   1   1   0
@@ -4687,9 +4687,9 @@ proc_elantech(struct psm_softc *sc, packetbuf_t *pb, mousestatus_t *ms,
 		 * over 9 bits with SX/SY the relative top bit and
 		 * X7..X0 and Y7..Y0 the lower bits.
 		 */
-		*x = (pb->ipacket[0] & 0x20) ?
+		*x = (pb->ipacket[0] & MOUSE_PS2_XNEG) ?
 		    pb->ipacket[4] - 256 : pb->ipacket[4];
-		*y = (pb->ipacket[0] & 0x10) ?
+		*y = (pb->ipacket[0] & MOUSE_PS2_YNEG) ?
 		    pb->ipacket[5] - 256 : pb->ipacket[5];
 
 		trackpoint_button =