1 files changed, 1 insertions, 0 deletions
diff --git a/hv.h b/hv.h
index 7866dea540..04780adf07 100644
--- a/hv.h
+++ b/hv.h
@@ -134,6 +134,7 @@ struct xpvhv_aux {
     U32         xhv_aux_flags;      /* assorted extra flags */
 
     /* The following fields are only valid if we have the flag HvAUXf_IS_CLASS */
+    HV          *xhv_class_superclass;         /* STASH of the :isa() base class */
     AV          *xhv_class_adjust_blocks;      /* CVs containing the ADJUST blocks */
     PADNAMELIST *xhv_class_fields;             /* PADNAMEs with PadnameIsFIELD() */
     PADOFFSET    xhv_class_next_fieldix;