diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c
--- a/Parser/tokenizer.c
+++ b/Parser/tokenizer.c
@@ -73,6 +73,10 @@ char *_PyParser_TokenNames[] = {
     "EQUAL",
     "DOT",
     "PERCENT",
+    /* "BACKQUOTE" should actually never be used since the backquote
+       operator has been removed, but we need to keep an entry here
+       so that this table matches up with the numbers in token.h.  */
+    "BACKQUOTE",
     "LBRACE",
     "RBRACE",
     "EQEQUAL",