diff --git a/osaca/data/isa/x86.yml b/osaca/data/isa/x86.yml
index da71771..fc9d3a5 100644
--- a/osaca/data/isa/x86.yml
+++ b/osaca/data/isa/x86.yml
@@ -3167,7 +3167,7 @@ instruction_forms:
           destination: false
       hidden_operands:
         - class: "memory"
-          base: "gpr"
+          base: {name: 'rsp'}
           offset: ~
           index: ~
           scale: 1
@@ -3177,11 +3177,29 @@ instruction_forms:
           name: "rsp"
           source: true
           destination: true
+    - name: pop
+      operands:
+        - class: "register"
+          name: "gpr"
+          source: false
+          destination: true
+      hidden_operands:
+        - class: "memory"
+          base: {name: 'rsp'}
+          offset: ~
+          index: ~
+          scale: 1
+          source: true
+          destination: false
+        - class: "register"
+          name: "rsp"
+          source: true
+          destination: true
     - name: pushfq
       operands: []
       hidden_operands:
         - class: "memory"
-          base: "gpr"
+          base: {name: 'rsp'}
           offset: ~
           index: ~
           scale: 1