diff --git a/ISLE/isle.h b/ISLE/isle.h
index d4f4e42e..ca9a9e76 100644
--- a/ISLE/isle.h
+++ b/ISLE/isle.h
@@ -12,7 +12,7 @@ class Isle
   Isle();
   ~Isle();
 
-  static void Close();
+  void Close();
 
   MxResult SetupWindow(HINSTANCE hInstance);