diff --git a/doc/Makefile.am b/doc/Makefile.am
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -11,6 +11,7 @@
 	doc/CMakeLists.txt
 
 DOC_EPS_IMAGES18 = \
+	grid_graph.eps \
 	nodeshape_0.eps \
 	nodeshape_1.eps \
 	nodeshape_2.eps \