diff --git a/platformio/pkgmanager.py b/platformio/pkgmanager.py
index c421a443..83f4f4b7 100644
--- a/platformio/pkgmanager.py
+++ b/platformio/pkgmanager.py
@@ -103,7 +103,7 @@ class PackageManager(object):
         except (requests.exceptions.ConnectionError,
                 requests.exceptions.ChunkedEncodingError,
                 exception.FDUnrecognizedStatusCode, StopIteration):
-            if info['url'].startswith("http://sourceforge.net"):
+            if not info['url'].startswith("http://dl.platformio.org"):
                 dlpath = self.download(
                     "http://dl.platformio.org/packages/%s" %
                     basename(info['url']), pkg_dir, info['sha1'])