diff --git a/pep-3154.txt b/pep-3154.txt
index a270085b5..e98adbf89 100644
--- a/pep-3154.txt
+++ b/pep-3154.txt
@@ -70,7 +70,7 @@ of a pickle is thus the following::
       etc.
 
 To keep the implementation simple, it is forbidden for a pickle opcode
-to overlap frame boundaries.  The pickler takes care not to produce such
+to straddle frame boundaries.  The pickler takes care not to produce such
 pickles, and the unpickler refuses them.  Also, there is no "last frame"
 marker.  The last frame is simply the one which ends with a STOP opcode.