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-rw-r--r--t/t0021/rot13-filter.pl1
1 files changed, 1 insertions, 0 deletions
diff --git a/t/t0021/rot13-filter.pl b/t/t0021/rot13-filter.pl
index e3ea58e1ed..4d5697ee51 100644
--- a/t/t0021/rot13-filter.pl
+++ b/t/t0021/rot13-filter.pl
@@ -21,6 +21,7 @@
use strict;
use warnings;
+use IO::File;
my $MAX_PACKET_CONTENT_SIZE = 65516;
my @capabilities = @ARGV;