diff --git a/target-s390x/op_helper.c b/target-s390x/op_helper.c
index b8a1a8a..cf26b29 100644
--- a/target-s390x/op_helper.c
+++ b/target-s390x/op_helper.c
@@ -636,6 +636,9 @@
         case 0x700:
             cc = helper_xc(l, get_address(0, b1, d1), get_address(0, b2, d2));
             break;
+        case 0xc00:
+            helper_tr(l, get_address(0, b1, d1), get_address(0, b2, d2));
+            break;
         default:
             goto abort;
             break;