diff --git a/core/cpu/x86/64/64.factor b/core/cpu/x86/64/64.factor
index 6d99b72439..bdd452f83d 100755
--- a/core/cpu/x86/64/64.factor
+++ b/core/cpu/x86/64/64.factor
@@ -178,7 +178,7 @@ stack-params "__stack_value" c-type set-c-type-reg-class >>
 
 : struct-types&offset ( struct-type -- pairs )
     struct-type-fields [
-        [ type>> ] [ offset>> ] bi 2array
+        [ class>> ] [ offset>> ] bi 2array
     ] map ;
 
 : split-struct ( pairs -- seq )