diff --git a/osaca/data/skx.yml b/osaca/data/skx.yml
index ebe3b66..f92ee69 100644
--- a/osaca/data/skx.yml
+++ b/osaca/data/skx.yml
@@ -1840,6 +1840,16 @@ instruction_forms:
   port_pressure: [[1, '0156']]
   throughput: 0.25
   uops: 1
+- name: SUB
+  operands:
+  - class: register
+    imd: gpr
+  - class: register
+    name: gpr
+  latency: 1
+  port_pressure: [[1, '0156']]
+  throughput: 0.25
+  uops: 1
 - name: REX SUB
   operands:
   - class: immediate