diff -r 829117ae2e55 Parser/parsetok.c
--- a/Parser/parsetok.c	Tue Jul 19 16:46:09 2016 -0500
+++ b/Parser/parsetok.c	Thu Jul 21 23:45:13 2016 +1000
@@ -320,7 +320,7 @@
         if (tok->buf != NULL) {
             size_t len;
             assert(tok->cur - tok->buf < INT_MAX);
-            err_ret->offset = (int)(tok->cur - tok->buf);
+            err_ret->offset = (int)(tok->start - tok->buf + 1);
             len = tok->inp - tok->buf;
             err_ret->text = (char *) PyObject_MALLOC(len + 1);
             if (err_ret->text != NULL) {