on, not of.

modules/exploits/windows/misc/achat_bof.rb

@@ -17,7 +17,7 @@ def initialize(info = {})
       'Description'    => %q{
         This module exploits a Unicode SEH buffer overflow in Achat. By
         sending a crafted message to the default port 9256/UDP, it's possible to overwrite the
-        SEH handler. Even when the exploit is reliable, it depends of timing since there are
+        SEH handler. Even when the exploit is reliable, it depends on timing since there are
         two threads overflowing the stack in the same time. This module has been tested on
         Achat v0.150 running on Windows XP SP3 and Windows 7.
       },