diff --git a/sys/dev/atkbdc/psm.c.orig b/sys/dev/atkbdc/psm.c
--- a/sys/dev/atkbdc/psm.c.orig
+++ b/sys/dev/atkbdc/psm.c
@@ -6278,7 +6278,7 @@
 		    active_ports_count);
 
 	/* psm has a special support for GenMouse + SynTouchpad combination */
-	if (active_ports_count >= 2) {
+	if (active_ports_count >= 1) {
 		for (port = 0; port < KBDC_AUX_MUX_NUM_PORTS; port++) {
 			if ((active_ports_mask & 1 << port) == 0)
 				continue;