diff --git a/osaca/data/a64fx.yml b/osaca/data/a64fx.yml
index a1a6d48..f99cbcb 100644
--- a/osaca/data/a64fx.yml
+++ b/osaca/data/a64fx.yml
@@ -187,14 +187,25 @@ instruction_forms:
 - name: adds
   operands:
   - class: register
-    prefix: x 
+    prefix: "*"
   - class: register
-    prefix: x
+    prefix: "*"
   - class: immediate
     imd: int
   throughput: 0.5
   latency: 1.0  # 	1*p34
   port_pressure: [[1, '34']]
+- name: adds
+  operands:
+  - class: register
+    prefix: "*"
+  - class: register
+    prefix: "*"
+  - class: register
+    prefix: "*"
+  throughput: 0.5
+  latency: 1.0  # 	1*p34
+  port_pressure: [[1, '34']]
 - name: and
   operands:
   - class: register