diff --git a/tools/ports/__init__.py b/tools/ports/__init__.py
index 594d6dd1d02b..a4adfa577047 100644
--- a/tools/ports/__init__.py
+++ b/tools/ports/__init__.py
@@ -300,7 +300,8 @@ def retrieve():
         import requests
         response = requests.get(url)
         data = response.content
-      except ImportError:
+      except (ImportError, requests.exceptions.InvalidSchema):
+        # requests does not support 'file://' protocol and raises InvalidSchema
         from urllib.request import urlopen
         f = urlopen(url)
         data = f.read()