1diff --git a/pygraphviz/agraph.py b/pygraphviz/agraph.py
2index 8f72024..2d8358e 100644
3--- a/pygraphviz/agraph.py
4+++ b/pygraphviz/agraph.py
5@@ -1557,7 +1557,7 @@ class AGraph(object):
6 import os
7 import glob
8
9- paths = os.environ["PATH"]
10+ paths = '@graphviz@/bin:' + os.environ["PATH"]
11 if os.name == "nt":
12 exe = ".exe"
13 else: