diff --git a/include/securimage/securimage.php b/include/securimage/securimage.php
index 955fbf869..eeb19e6ed 100755
--- a/include/securimage/securimage.php
+++ b/include/securimage/securimage.php
@@ -283,7 +283,7 @@ class Securimage
      * The character set to use for generating the captcha code
      * @var string
      */
-    public $charset        = 'ABCDEFGHKLMNPRSTUVWYZabcdefghklmnprstuvwyz23456789';
+    public $charset        = 'ABCDEFGHKLMNPRSTUVWYZabcdefghkmnprstuvwyz23456789';
     /**
      * How long in seconds a captcha remains valid, after this time it will not be accepted
      * @var unknown_type