diff --git a/data/languages/xtensa.cspec b/data/languages/xtensa.cspec
index f7049a2..19b9cc0 100644
--- a/data/languages/xtensa.cspec
+++ b/data/languages/xtensa.cspec
@@ -55,14 +55,14 @@
         <pentry minsize="1" maxsize="4" extension="inttype">
           <register name="a2"/>
         </pentry>
-        <pentry minsize="1" maxsize="4" extension="inttype">
-          <register name="a3"/>
+        <pentry minsize="5" maxsize="8" extension="inttype">
+          <addr space="join" piece1="a3" piece2="a2"/>
         </pentry>
-        <pentry minsize="1" maxsize="4" extension="inttype">
-          <register name="a4"/>
+        <pentry minsize="9" maxsize="12" extension="inttype">
+          <addr space="join" piece1="a4" piece2="a3" piece3="a2"/>
         </pentry>
-        <pentry minsize="1" maxsize="4" extension="inttype">
-          <register name="a5"/>
+        <pentry minsize="13" maxsize="16" extension="inttype">
+          <addr space="join" piece1="a5" piece2="a4" piece3="a3" piece4="a2"/>
         </pentry>
     </output>
     <returnaddress>