I think for now these have to be disabled by default.

p4raw-id: //depot/perl@24572

1 files changed, 1 insertions, 1 deletions

diff --git a/hv.h b/hv.h
index ddbdd80b06..d53bfaf807 100644
--- a/hv.h
+++ b/hv.h
@@ -63,7 +63,7 @@ struct xpvhv {
 #define xhv_aux xnv_u.xnv_s.xnv_p1
 #define xhv_keys xnv_u.xnv_s.xnv_u2.xnv_i2
 
-#if 0
+#if !defined(PERL_EXPERIMENTAL_LAYOUT)
 typedef struct xpvhv xpvhv_allocated;
 #else
 typedef struct {