you are probably bypassing it anyway by invoking your script with the perl executable on the command line.
Perl actually honors command line switches on the she bang line, even when invoked directly: 
$ cat xxx
#!/usr/bin/perl -w

print undef;
$ perl xxx
Use of uninitialized value in print at xxx line 3.

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In reply to Re^2: DNS Lookup by JavaFan
in thread DNS Lookup by jaldama

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