diff --git a/setup.py b/setup.py
index b4848267..8d676b79 100755
--- a/setup.py
+++ b/setup.py
@@ -48,6 +48,7 @@ def normalize(v):
     '/usr',
     '/usr/local',
     '/opt/',
+    '/opt/local',
     ]
 
 for re2_prefix in _re2_prefixes: