diff --git a/Lib/trace.py b/Lib/trace.py
index 35edac2..364e3f7 100644
--- a/Lib/trace.py
+++ b/Lib/trace.py
@@ -587,7 +587,7 @@
         """
         if why == 'call':
             code = frame.f_code
-            filename = code.co_filename
+            filename = frame.f_globals.get('__file__', None)
             if filename:
                 # XXX modname() doesn't work right for packages, so
                 # the ignore support won't work right for packages
diff --git a/Misc/NEWS b/Misc/NEWS
index 0ac7328..e6832c6 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -169,6 +169,9 @@
 Library
 -------
 
+- Patch 1571379: Make trace's --ignore-dir facility work in the face of
+  relative directory names.
+
 - Bug #1600860: Search for shared python library in LIBDIR, not lib/python/config,
   on "linux" and "gnu" systems.