diff --git a/Contrib/Modern UI/Readme.html b/Contrib/Modern UI/Readme.html
index f5886770..f4d9f921 100644
--- a/Contrib/Modern UI/Readme.html	
+++ b/Contrib/Modern UI/Readme.html	
@@ -1185,6 +1185,10 @@ macros.</p>
 <strong>MUI_CUSTOMFUNCTION_ABORT</strong> <span class=
 "parameter">function</span><br />
 <strong>MUI_CUSTOMFUNCTION_UNABORT</strong> <span class=
+"parameter">function</span><br />
+<strong>MUI_CUSTOMFUNCTION_MOUSEOVERSECTION</strong> <span class=
+"parameter">function</span><br />
+<strong>MUI_CUSTOMFUNCTION_UNMOUSEOVERSECTION</strong> <span class=
 "parameter">function</span></p>
 </div>
 <h3><img class="trigger" alt="Open/Close section" id="trigger_cfpg"
diff --git a/Contrib/Modern UI/System.nsh b/Contrib/Modern UI/System.nsh
index a2eb31db..afd21086 100644
--- a/Contrib/Modern UI/System.nsh	
+++ b/Contrib/Modern UI/System.nsh	
@@ -507,6 +507,9 @@ Var /GLOBAL MUI_TEMP2
   !verbose ${MUI_VERBOSE}
 
     !insertmacro MUI_DESCRIPTION_END
+    !ifdef MUI_CUSTOMFUNCTION_ONMOUSEOVERSECTION
+      Call "${MUI_CUSTOMFUNCTION_ONMOUSEOVERSECTION}"
+    !endif
   FunctionEnd
 
   !verbose pop
@@ -531,6 +534,9 @@ Var /GLOBAL MUI_TEMP2
   !verbose ${MUI_VERBOSE}
 
     !insertmacro MUI_DESCRIPTION_END
+    !ifdef MUI_CUSTOMFUNCTION_UNONMOUSEOVERSECTION
+      Call "${MUI_CUSTOMFUNCTION_UNONMOUSEOVERSECTION}"
+    !endif
   FunctionEnd
 
   !verbose pop