diff --git a/PowerEditor/src/NppCommands.cpp b/PowerEditor/src/NppCommands.cpp
index 9fc07a6a..6ab84840 100644
--- a/PowerEditor/src/NppCommands.cpp
+++ b/PowerEditor/src/NppCommands.cpp
@@ -2322,6 +2322,10 @@ void Notepad_plus::command(int id)
 		case IDM_LANG_USER :
 		{
             setLanguage(menuID2LangType(id));
+			if (_pDocMap)
+			{
+				_pDocMap->setSyntaxHiliting();
+			}
 		}
         break;