diff --git a/platformio/util.py b/platformio/util.py
index 83c3bdf3..4f7ed8b2 100644
--- a/platformio/util.py
+++ b/platformio/util.py
@@ -37,7 +37,7 @@ def get_home_dir():
         pass
 
     if not home_dir:
-        home_dir = expanduser("~/.platformio")
+        home_dir = join(expanduser("~"), ".platformio")
 
     if not isdir(home_dir):
         makedirs(home_dir)