diff --git a/pep-3151.txt b/pep-3151.txt
index 40669dc08..cd0eb2b95 100644
--- a/pep-3151.txt
+++ b/pep-3151.txt
@@ -188,7 +188,7 @@ depending on the implementation)
 exceptions, examines the ``errno`` attribute to determine the actual error
 condition and takes action depending on it.
 
-The we can define *useful compatibility* as follows:
+Then we can define *useful compatibility* as follows:
 
 * useful compatibility doesn't make exception catching any narrower, but
   it can be broader for *careless* exception-catching code.  Given the following