diff --git a/Python/import.c b/Python/import.c
index b074b83..4159a8e 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -124,12 +124,12 @@
 /* See _PyImport_FixupExtensionObject() below */
 static PyObject *extensions = NULL;
 
+/* Function from Parser/tokenizer.c */
+extern char * PyTokenizer_FindEncodingFilename(int, PyObject *);
+
 /* This table is defined in config.c: */
 extern struct _inittab _PyImport_Inittab[];
 
-/* Method from Parser/tokenizer.c */
-extern char * PyTokenizer_FindEncoding(int);
-
 struct _inittab *PyImport_Inittab = _PyImport_Inittab;
 
 /* these tables define the module suffixes that Python recognizes */
@@ -3540,9 +3540,9 @@
     }
     if (fd != -1) {
         if (strchr(fdp->mode, 'b') == NULL) {
-            /* PyTokenizer_FindEncoding() returns PyMem_MALLOC'ed
+            /* PyTokenizer_FindEncodingFilename() returns PyMem_MALLOC'ed
                memory. */
-            found_encoding = PyTokenizer_FindEncoding(fd);
+            found_encoding = PyTokenizer_FindEncodingFilename(fd, pathobj);
             lseek(fd, 0, 0); /* Reset position */
             if (found_encoding == NULL && PyErr_Occurred()) {
                 Py_XDECREF(pathobj);
diff --git a/Python/traceback.c b/Python/traceback.c
index f0142da..e74a147 100644
--- a/Python/traceback.c
+++ b/Python/traceback.c
@@ -18,8 +18,8 @@
 #define MAX_FRAME_DEPTH 100
 #define MAX_NTHREADS 100
 
-/* Method from Parser/tokenizer.c */
-extern char * PyTokenizer_FindEncoding(int);
+/* Function from Parser/tokenizer.c */
+extern char * PyTokenizer_FindEncodingFilename(int, PyObject *);
 
 static PyObject *
 tb_dir(PyTracebackObject *self)
@@ -251,7 +251,7 @@
 
     /* use the right encoding to decode the file as unicode */
     fd = PyObject_AsFileDescriptor(binary);
-    found_encoding = PyTokenizer_FindEncoding(fd);
+    found_encoding = PyTokenizer_FindEncodingFilename(fd, filename);
     encoding = (found_encoding != NULL) ? found_encoding : "utf-8";
     lseek(fd, 0, 0); /* Reset position */
     fob = PyObject_CallMethod(io, "TextIOWrapper", "Os", binary, encoding);