diff --git a/pep-3119.txt b/pep-3119.txt
index a9824a2b844..16be3cf348a 100644
--- a/pep-3119.txt
+++ b/pep-3119.txt
@@ -141,7 +141,7 @@ Overloading ``isinstance()`` and ``issubclass()``
 
 During the development of this PEP and of its companion, PEP 3141, we
 repeatedly faced the choice between standardizing more, fine-grained
-ABCs or fewer, course-grained ones.  For example, at one stage, PEP
+ABCs or fewer, coarse-grained ones.  For example, at one stage, PEP
 3141 introduced the following stack of base classes used for complex
 numbers: MonoidUnderPlus, AdditiveGroup, Ring, Field, Complex (each
 derived from the previous).  And the discussion mentioned several