diff -r 289d80c33f04 -r 1a770e9f80b2 src/lemon/Makefile.am
--- a/src/lemon/Makefile.am	Thu Nov 04 22:04:51 2004 +0000
+++ b/src/lemon/Makefile.am	Fri Nov 05 00:31:49 2004 +0000
@@ -33,11 +33,13 @@
 	idmappable_graph_extender.h				   	\
 	extendable_graph_extender.h					\
 	clearable_graph_extender.h					\
-	erasable_graph_extender.h
+	erasable_graph_extender.h					\
+	undir_graph_extender.h
 
 noinst_HEADERS =							\
 	concept/graph.h							\
 	concept/graph_component.h					\
+	concept/undir_graph.h						\
 	concept/sym_graph.h						\
 	concept/maps.h							\
 	concept/path.h