diff --git a/src/pit.c b/src/pit.c
index a9099cfca..6045fd842 100644
--- a/src/pit.c
+++ b/src/pit.c
@@ -662,11 +662,11 @@ pit_read_reg(void *priv, uint8_t reg)
                this register is structured.
                Update: But the SiS 5571 datasheet is clear. */
             ret = (dev->counters[0].rm & 0x80) ? 0x01 : 0x00;
-            ret = (dev->counters[1].rm & 0x80) ? 0x02 : 0x00;
-            ret = (dev->counters[2].rm & 0x80) ? 0x04 : 0x00;
-            ret = (dev->counters[0].wm & 0x80) ? 0x08 : 0x00;
-            ret = (dev->counters[1].wm & 0x80) ? 0x10 : 0x00;
-            ret = (dev->counters[2].wm & 0x80) ? 0x20 : 0x00;
+            ret |= (dev->counters[1].rm & 0x80) ? 0x02 : 0x00;
+            ret |= (dev->counters[2].rm & 0x80) ? 0x04 : 0x00;
+            ret |= (dev->counters[0].wm & 0x80) ? 0x08 : 0x00;
+            ret |= (dev->counters[1].wm & 0x80) ? 0x10 : 0x00;
+            ret |= (dev->counters[2].wm & 0x80) ? 0x20 : 0x00;
             break;
     }