diff -r 2ba916d7aae3 -r 2ff283124dfc lemon/smart_graph.h
--- a/lemon/smart_graph.h	Mon Mar 06 09:38:19 2006 +0000
+++ b/lemon/smart_graph.h	Mon Mar 06 10:28:37 2006 +0000
@@ -27,6 +27,7 @@
 
 #include <lemon/bits/invalid.h>
 
+#include <lemon/bits/base_extender.h>
 #include <lemon/bits/graph_extender.h>
 
 #include <lemon/bits/utility.h>