diff --git a/WORKSPACE b/WORKSPACE
index ea12f439..17e96c0b 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -270,7 +270,7 @@ new_local_repository(
     # For local MacOS builds, the path should point to an opencv@3 installation.
     # If you edit the path here, you will also need to update the corresponding
     # prefix in "opencv_macos.BUILD".
-    path = "/usr/local",
+    path = "/usr/local",  # e.g. /usr/local/Cellar for HomeBrew
 )
 
 new_local_repository(