diff --git a/trytond/tools/misc.py b/trytond/tools/misc.py
index 95092baaa2..0639eab3ed 100644
--- a/trytond/tools/misc.py
+++ b/trytond/tools/misc.py
@@ -119,6 +119,8 @@ def file_open(name, mode="r", subdir='modules'):
     name2 = False
     while True:
         head, tail = os.path.split(head)
+        if head == root_path:
+            break
         if not tail:
             break
         if zipname: