diff --git a/src/chipset/sis_85c50x.c b/src/chipset/sis_85c50x.c
index 56d3a0a30..ebd166d60 100644
--- a/src/chipset/sis_85c50x.c
+++ b/src/chipset/sis_85c50x.c
@@ -29,6 +29,7 @@
 #include <86box/timer.h>
 
 #include <86box/apm.h>
+#include <86box/machine.h>
 #include <86box/mem.h>
 #include <86box/smram.h>
 #include <86box/pci.h>
@@ -416,6 +417,11 @@ sis_85c50x_init(const device_t *info)
 
     sis_85c50x_reset(dev);
 
+    if (machine_has_bus(machine, MACHINE_BUS_PS2)) {
+        pic_kbd_latch(0x01);
+        pic_mouse_latch(0x01);
+    }
+
     return dev;
 }