else if (PL_compiling.cop_warnings == pWARN_ALL) {
/* Get the bit mask for $warnings::Bits{all}, because
* it could have been extended by warnings::register */
- HV * const bits=get_hv("warnings::Bits", FALSE);
+ HV * const bits=get_hv("warnings::Bits", 0);
if (bits) {
SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
if (bits_all)