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-rw-r--r--web/lib/acctfuncs.inc.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/web/lib/acctfuncs.inc.php b/web/lib/acctfuncs.inc.php
index 962ebb45..51ffec63 100644
--- a/web/lib/acctfuncs.inc.php
+++ b/web/lib/acctfuncs.inc.php
@@ -538,7 +538,7 @@ function valid_username($user) {
if (strlen($user) < USERNAME_MIN_LEN ||
strlen($user) > USERNAME_MAX_LEN) {
return false;
- } else if (!preg_match("/^[a-z0-9]+[.\-_]?[a-z0-9]+$/", $user)) {
+ } else if (!preg_match("/^[a-z0-9]+[.\-_]?[a-z0-9]+$/i", $user)) {
return false;
}