diff --git a/pep-3103.txt b/pep-3103.txt
index 27a9f54a0..7dcf8ea1d 100644
--- a/pep-3103.txt
+++ b/pep-3103.txt
@@ -480,7 +480,7 @@ there is a spelling error in a NAME, however, the error will be caught
 as soon as it is evaluated.  Also, sometimes the constants are
 externally defined (e.g. when parsing a file format like JPEG) and we
 can't easily choose appropriate string values.  Using an explicit
-mappping dict sounds like a poor hack.
+mapping dict sounds like a poor hack.
 
 Option 2
 ''''''''