diff --git a/Contrib/Modern UI/Readme.html b/Contrib/Modern UI/Readme.html
index 9f074b57..716d690f 100644
--- a/Contrib/Modern UI/Readme.html	
+++ b/Contrib/Modern UI/Readme.html	
@@ -546,7 +546,7 @@ create your own function and let the Modern UI functions call them. Use the defi
 to define the name of your functions. Add the defines before the MUI_LANGUAGE macro's.</p>
 <p class="text">Example:</p>
 <pre class="text">
-!define MUI_CUSTOMFUNCTION_ONGUIINIT myGuiInit
+!define MUI_CUSTOMFUNCTION_GUIINIT myGuiInit
 
 Function myGUIInit
   ...your own code...