diff --git a/Contrib/Modern UI/Readme.html b/Contrib/Modern UI/Readme.html
index 1f4bf7b0..ab72408e 100644
--- a/Contrib/Modern UI/Readme.html	
+++ b/Contrib/Modern UI/Readme.html	
@@ -978,7 +978,7 @@ The text to display on the language selection dialog.</p>
 Always show the language selection dialog, even if a language has
 been stored in the registry. The language stored in the registry
 will be selected by default.</p>
-<p><strong>MUI_LANGDLL_SHOW_ALL_LANGUAGES</strong><br />
+<p><strong>MUI_LANGDLL_ALLLANGUAGES</strong><br />
 Always show all available languages and don't filter according
 to their codepage.</p>
 </div>
diff --git a/Contrib/Modern UI/System.nsh b/Contrib/Modern UI/System.nsh
index 74ee173a..f0225b0f 100644
--- a/Contrib/Modern UI/System.nsh	
+++ b/Contrib/Modern UI/System.nsh	
@@ -2066,7 +2066,7 @@ Var /GLOBAL MUI_TEMP2
 
   !endif
 
-  !ifdef MUI_LANGDLL_SHOW_ALL_LANGUAGES
+  !ifdef MUI_LANGDLL_ALLLANGUAGES
     LangDLL::LangDialog "${MUI_LANGDLL_WINDOWTITLE}" "${MUI_LANGDLL_INFO}" A ${MUI_LANGDLL_PUSHLIST} ""
   !else
     LangDLL::LangDialog "${MUI_LANGDLL_WINDOWTITLE}" "${MUI_LANGDLL_INFO}" AC ${MUI_LANGDLL_PUSHLIST} ""
@@ -2250,7 +2250,7 @@ Var /GLOBAL MUI_TEMP2
   !insertmacro MUI_LANGUAGEFILE_DEFINE "MUI_${LANGUAGE}_LANGNAME" "MUI_LANGNAME"
 
   !ifndef MUI_LANGDLL_PUSHLIST
-    !ifdef MUI_LANGDLL_SHOW_ALL_LANGUAGES
+    !ifdef MUI_LANGDLL_ALLLANGUAGES
       !define MUI_LANGDLL_PUSHLIST "'${MUI_${LANGUAGE}_LANGNAME}' '${LANG_${LANGUAGE}}' "
     !else
       !define MUI_LANGDLL_PUSHLIST "'${MUI_${LANGUAGE}_LANGNAME}' '${LANG_${LANGUAGE}}' '${LANG_${LANGUAGE}_CP}' "
@@ -2262,7 +2262,7 @@ Var /GLOBAL MUI_TEMP2
     !define MUI_LANGDLL_PUSHLIST_TEMP "${MUI_LANGDLL_PUSHLIST}"
     !undef MUI_LANGDLL_PUSHLIST
 
-    !ifdef MUI_LANGDLL_SHOW_ALL_LANGUAGES
+    !ifdef MUI_LANGDLL_ALLLANGUAGES
       !define MUI_LANGDLL_PUSHLIST "'${MUI_${LANGUAGE}_LANGNAME}' '${LANG_${LANGUAGE}}' ${MUI_LANGDLL_PUSHLIST_TEMP}"
     !else
       !define MUI_LANGDLL_PUSHLIST "'${MUI_${LANGUAGE}_LANGNAME}' '${LANG_${LANGUAGE}}' '${LANG_${LANGUAGE}_CP}' ${MUI_LANGDLL_PUSHLIST_TEMP}"