diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index e004d2e81f..c8f6f426c6 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -1017,7 +1017,7 @@ class acp_board
 		$user->timezone = $old_tz;
 
 		return "<select name=\"dateoptions\" id=\"dateoptions\" onchange=\"if (this.value == 'custom') { document.getElementById('" . addslashes($key) . "').value = '" . addslashes($value) . "'; } else { document.getElementById('" . addslashes($key) . "').value = this.value; }\">$dateformat_options</select>
-		<input type=\"text\" name=\"config[$key]\" id=\"$key\" value=\"$value\" maxlength=\"30\" />";
+		<input type=\"text\" name=\"config[$key]\" id=\"$key\" value=\"$value\" maxlength=\"64\" />";
 	}
 
 	/**