diff --git a/extern/CMakeLists.txt b/extern/CMakeLists.txt
index cf7a3bcf70..6f55e4f1c6 100644
--- a/extern/CMakeLists.txt
+++ b/extern/CMakeLists.txt
@@ -68,6 +68,7 @@ if(NOT OPENMW_USE_SYSTEM_MYGUI)
     set(MYGUI_BUILD_DEMOS OFF CACHE BOOL "")
     set(MYGUI_BUILD_PLUGINS OFF CACHE BOOL "")
     set(MYGUI_BUILD_TOOLS OFF CACHE BOOL "")
+    set(MYGUI_DONT_USE_OBSOLETE ON CACHE BOOL "")
 
     if(MYGUI_STATIC)
         set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)