1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/inspect.py b/Lib/inspect.py
index e60a235fe4..22b9e84543 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -476,7 +476,7 @@ def getsourcefile(object):
     if os.path.exists(filename):
         return filename
     # only return a non-existent filename if the module has a PEP 302 loader
-    if hasattr(getmodule(object, filename), '__loader__'):
+    if getattr(getmodule(object, filename), '__loader__', None) is not None:
         return filename
     # or it is in the linecache
     if filename in linecache.cache: