diff --git a/guide.html b/guide.html
index 5ad8089..754dc7e 100644
--- a/guide.html
+++ b/guide.html
@@ -41,6 +41,7 @@
             <p>This can have multiple reasons:</p>
             <ul>
                <li>You don't have cheats enabled: See <a href="#2.3">2.3</a> for details.</li>
+               <li>You're using an obsolete version of Nintendont. Make sure you use version 4.434 or newer.</li>
                <li>Your cheatfile has the wrong name: Make sure the file is named "GMSE01.gct", "GMSJ01.gct" or "GMSP01.gct". It won't work with names like "GMSE01 (1).gct". Nintendont is very picky!</li>
                <li>Your cheatfile is at the wrong location: Make sure the file is in the "codes" folder of your SD Card. Again, the folder has to be named "codes". If you have a "games" folder, make sure there's no file with the same name in it or its subfolders.</li>
                <li>Your cheatfile is too big: Using too many codes at once can cause Nintendont to disable them since the used space in the game is limited. Make sure you don't have two incompatible codes selected when downloading the cheatfile (for example "Level Select" and "Ingame Timer" are not compatible).</li>