diff --git a/setup.py b/setup.py
index 7d8e1c1ee21..a2daaf98a58 100644
--- a/setup.py
+++ b/setup.py
@@ -23,8 +23,9 @@
 def get_version():
     version_file = "src/PIL/_version.py"
     with open(version_file, encoding="utf-8") as f:
-        exec(compile(f.read(), version_file, "exec"))
-    return locals()["__version__"]
+        lcl = {}
+        exec(compile(f.read(), version_file, "exec"), lcl)
+    return lcl["__version__"]
 
 
 configuration = {}