diff --git a/hw/lsi53c895a.c b/hw/lsi53c895a.c
index 9d3c44d1c7b1fb8eeec0e33d8eea08bf55a5a39e..f5a91ba10aba11b3bf73d80443c7d768feb08668 100644
--- a/hw/lsi53c895a.c
+++ b/hw/lsi53c895a.c
@@ -543,7 +543,7 @@ static void lsi_do_dma(LSIState *s, int out)
         return;
     }
 
-    id = s->current->tag >> 8;
+    id = (s->current->tag >> 8) & 0xf;
     dev = s->bus.devs[id];
     if (!dev) {
         lsi_bad_selection(s, id);
@@ -745,7 +745,7 @@ static void lsi_do_command(LSIState *s)
     s->sfbr = buf[0];
     s->command_complete = 0;
 
-    id = s->select_tag >> 8;
+    id = (s->select_tag >> 8) & 0xf;
     dev = s->bus.devs[id];
     if (!dev) {
         lsi_bad_selection(s, id);