diff --git a/doc/Makefile.am b/doc/Makefile.am
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -28,6 +28,7 @@
 	connected_components.eps \
 	edge_biconnected_components.eps \
 	node_biconnected_components.eps \
+	planar.eps \
 	strongly_connected_components.eps
 
 DOC_EPS_IMAGES = \