diff --git a/Lib/linecache.py b/Lib/linecache.py
index 974b1d9..c3f2c3f 100644
--- a/Lib/linecache.py
+++ b/Lib/linecache.py
@@ -123,9 +123,7 @@
         else:
             return []
     try:
-        with open(fullname, 'rb') as fp:
-            coding, line = tokenize.detect_encoding(fp.readline)
-        with open(fullname, 'r', encoding=coding) as fp:
+        with tokenize.open(fullname) as fp:
             lines = fp.readlines()
     except IOError:
         return []