diff -r 096d83158d41 -r 81b47fc5c444 lemon/bits/utility.h
--- a/lemon/bits/utility.h	Fri Mar 02 17:56:22 2007 +0000
+++ b/lemon/bits/utility.h	Fri Mar 02 18:04:28 2007 +0000
@@ -69,9 +69,7 @@
   };
 
 
-  class InvalidType {
-  private:
-    InvalidType();
+  struct InvalidType {
   };
 
   template <typename T>