}
/* appearances to the contrary, this is an freopen substitute */
name = sv_2mortal(newSVpvn(filespec,strlen(filespec)));
- if (PerlIO_openn(Nullch,acmode,-1,0,0,fp,1,&name) == Nullfp) XSRETURN_UNDEF;
+ if (PerlIO_openn(aTHX_ Nullch,acmode,-1,0,0,fp,1,&name) == Nullfp) XSRETURN_UNDEF;
if (iotype != '-' && ret != -1 && PerlIO_setpos(fp,&pos) == -1) XSRETURN_UNDEF;
if (ret == -1) { set_errno(saverrno); set_vaxc_errno(savevmserrno); }
XSRETURN_YES;