diff --git a/Lib/pdb.py b/Lib/pdb.py
index f355d45..d4eb8bd 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -1123,7 +1123,7 @@
         # Start with fresh empty copy of globals and locals and tell the script
         # that it's being run as __main__ to avoid scripts being able to access
         # the pdb.py namespace.
-        globals_ = {"__name__" : "__main__"}
+        globals_ = {"__name__" : "__main__", "__file__" : filename}
         locals_ = globals_
 
         # When bdb sets tracing, a number of call and line events happens