1 files changed, 4 insertions, 1 deletions
diff --git a/op.h b/op.h
index 35bd97f11d..7b86d59f70 100644
--- a/op.h
+++ b/op.h
@@ -693,7 +693,10 @@ preprocessing token; the type of I<arg> depends on I<which>.
 #define RV2CVOPCV_MARK_EARLY     0x00000001
 #define RV2CVOPCV_RETURN_NAME_GV 0x00000002
 #define RV2CVOPCV_RETURN_STUB    0x00000004
-#define RV2CVOPCV_FLAG_MASK      0x00000007 /* all of the above */
+#ifdef PERL_CORE /* behaviour of this flag is subject to change: */
+# define RV2CVOPCV_MAYBE_NAME_GV  0x00000008
+#endif
+#define RV2CVOPCV_FLAG_MASK      0x0000000f /* all of the above */
 
 #define op_lvalue(op,t) Perl_op_lvalue_flags(aTHX_ op,t,0)