diff --git a/lemon/Makefile.am b/lemon/Makefile.am
--- a/lemon/Makefile.am
+++ b/lemon/Makefile.am
@@ -83,6 +83,7 @@
 	lemon/gomory_hu.h \
 	lemon/graph_to_eps.h \
 	lemon/grid_graph.h \
+	lemon/howard.h \
 	lemon/hypercube_graph.h \
 	lemon/kruskal.h \
 	lemon/hao_orlin.h \
@@ -97,7 +98,6 @@
 	lemon/matching.h \
 	lemon/math.h \
 	lemon/min_cost_arborescence.h \
-	lemon/min_mean_cycle.h \
 	lemon/nauty_reader.h \
 	lemon/network_simplex.h \
 	lemon/path.h \