diff --git a/Contrib/Modern UI/Readme.html b/Contrib/Modern UI/Readme.html
index 5ba8fd0b..c90463f9 100644
--- a/Contrib/Modern UI/Readme.html	
+++ b/Contrib/Modern UI/Readme.html	
@@ -795,6 +795,8 @@ Text to display next to the 'Reboot now' option button.</p>
 <p><strong>MUI_FINISHPAGE_TEXT_REBOOTLATER</strong> <span class=
 "parameter">text</span><br />
 Text to display next to the 'Reboot later' option button.</p>
+<p><strong>MUI_FINISHPAGE_REBOOTLATER_DEFAULT</strong><br />
+Sets the 'Reboot later' option as the default option.</p>
 <p><strong>MUI_FINISHPAGE_RUN</strong> <span class=
 "parameter">exe_file</span><br />
 Application which the user can select to run using a checkbox. You
diff --git a/Contrib/Modern UI/System.nsh b/Contrib/Modern UI/System.nsh
index a82c4fa9..3e40cc58 100644
--- a/Contrib/Modern UI/System.nsh	
+++ b/Contrib/Modern UI/System.nsh	
@@ -1012,6 +1012,7 @@ Var /GLOBAL MUI_TEMP2
   !insertmacro MUI_UNSET MUI_FINISHPAGE_TEXT_REBOOT
   !insertmacro MUI_UNSET MUI_FINISHPAGE_TEXT_REBOOTNOW
   !insertmacro MUI_UNSET MUI_FINISHPAGE_TEXT_REBOOTLATER
+  !insertmacro MUI_UNSET MUI_FINISHPAGE_REBOOTLATER_DEFAULT
   !insertmacro MUI_UNSET MUI_FINISHPAGE_RUN
     !insertmacro MUI_UNSET MUI_FINISHPAGE_RUN_TEXT
     !insertmacro MUI_UNSET MUI_FINISHPAGE_RUN_PARAMETERS
@@ -1515,7 +1516,6 @@ Var /GLOBAL MUI_TEMP2
             !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 4" "Bottom" "140"
           !endif
         !endif
-        !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 4" "State" "1"
         !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 5" "Type" "RadioButton"
         !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 5" "Text" "${MUI_FINISHPAGE_TEXT_REBOOTLATER}"
         !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 5" "Left" "120"
@@ -1527,6 +1527,11 @@ Var /GLOBAL MUI_TEMP2
           !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 5" "Top" "110"
           !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 5" "Bottom" "120"
         !endif
+        !ifdef MUI_FINISHPAGE_REBOOTLATER_DEFAULT
+          !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 5" "State" "1"
+        !else
+          !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "Field 4" "State" "1"
+        !endif
 
         Goto mui.finish_load