Nullsv is kinda deprecated and not available anymore if PERL_CORE is defined.

diff --git a/Declare.xs b/Declare.xs
index d4b74f9..8b9bb37 100644 (file)
--- a/Declare.xs
+++ b/Declare.xs
@@ -138,7 +138,7 @@ char* dd_get_lex_stuff(pTHX) {
 
 char* dd_clear_lex_stuff(pTHX) {
   if (DD_HAVE_PARSER)
-    PL_lex_stuff = Nullsv;
+    PL_lex_stuff = (SV*)NULL;
 }
 
 char* dd_get_curstash_name(pTHX) {