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-rw-r--r--mdkonline.pm2
1 files changed, 1 insertions, 1 deletions
diff --git a/mdkonline.pm b/mdkonline.pm
index be9ce8e4..b92651bb 100644
--- a/mdkonline.pm
+++ b/mdkonline.pm
@@ -139,7 +139,7 @@ sub check_valid_email {
sub check_valid_boxname {
my $boxname = shift;
return 0 if length($boxname) >= 40;
- my $bt = $boxname =~ /^[a-zA-Z][a-zA-Z0-9]+$/i ? 1 : 0;
+ my $bt = $boxname =~ /^[a-zA-Z][a-zA-Z0-9_]+$/i ? 1 : 0;
$bt
}