sv.c: Add cast to make C++ happy

1 files changed, 1 insertions, 1 deletions

diff --git a/sv.c b/sv.c
index 2bbd55b048..0221628805 100644
--- a/sv.c
+++ b/sv.c
@@ -5959,7 +5959,7 @@ Perl_sv_get_backrefs(pTHX_ SV *const sv)
 
     if (SvTYPE(sv) == SVt_PVHV) {
         if (SvOOK(sv))
-            svp = (SV**)Perl_hv_backreferences_p(aTHX_ sv);
+            svp = (SV**)Perl_hv_backreferences_p(aTHX_ (HV *)sv);
     } else {
         if (SvMAGICAL(sv))
             mg = mg_find(sv, PERL_MAGIC_backref);