diff --git a/pep-3154.txt b/pep-3154.txt
index a854dd71b..a270085b5 100644
--- a/pep-3154.txt
+++ b/pep-3154.txt
@@ -59,11 +59,11 @@ of a pickle is thus the following::
     +------+------+
     | 0x80 | 0x04 |  protocol header (2 bytes)
     +------+------+-----------+
-    | AA BB CC DD EE FF GG HH |  frame size (8 bytes, little-endian)
+    | MM MM MM MM MM MM MM MM |  frame size (8 bytes, little-endian)
     +------+------------------+
-    | .... |  first frame contents (N bytes)
+    | .... |  first frame contents (M bytes)
     +------+------+-----------+
-    | AA BB CC DD EE FF GG HH |  frame size (8 bytes, little-endian)
+    | NN NN NN NN NN NN NN NN |  frame size (8 bytes, little-endian)
     +------+------------------+
     | .... |  second frame contents (N bytes)
     +------+