diff --git a/Lib/linecache.py b/Lib/linecache.py
index e7c33e1..c999851 100644
--- a/Lib/linecache.py
+++ b/Lib/linecache.py
@@ -133,6 +133,8 @@
     except IOError, msg:
 ##      print '*** Cannot open', fullname, ':', msg
         return []
+    if lines and not lines[-1].endswith('\n'):
+        lines[-1] += '\n'
     size, mtime = stat.st_size, stat.st_mtime
     cache[filename] = size, mtime, lines, fullname
     return lines