diff --git a/src/Environments/Windows/windows64.xml b/src/Environments/Windows/windows64.xml
index c750534486..710bf47b9d 100644
--- a/src/Environments/Windows/windows64.xml
+++ b/src/Environments/Windows/windows64.xml
@@ -200432,7 +200432,6 @@
         <ptr>
           <prim domain="SignedInt" size="4" />
         </ptr>
-        <reg>eax</reg>
       </return>
     </signature>
   </procedure>