diff --git a/example/graphviz_example.dot b/example/graphviz_example.dot
index d342341b..77582479 100644
--- a/example/graphviz_example.dot
+++ b/example/graphviz_example.dot
@@ -1,4 +1,4 @@
-graph {
+graph foo {
   edge [weight="10"];
   0 -- 1 [weight="3.14159"];
   1 -- foo [weight="2.71828"];