diff --git a/poetry/spdx/__init__.py b/poetry/spdx/__init__.py
index 3d6cc433f15..811210b0f3b 100644
--- a/poetry/spdx/__init__.py
+++ b/poetry/spdx/__init__.py
@@ -25,7 +25,7 @@ def license_by_id(identifier):
         # MIT/WTFPL/Unlicense are excluded as their ids are simply their name - if someone types "mit", they've already found the license they were looking for
 
         common_strings = ["agpl", "lgpl", "gpl", "bsd", "apache", "mpl", "cc0"]
-        for str in common_strings:
+        for string in common_strings:
             if str in id:
 
                 err += "\n"