diff --git a/source/compat.txt b/source/compat.txt
index af33ef127ef6986d3edfc6071068193c755b9d03_c291cmNlL2NvbXBhdC50eHQ=..771a5ce67d0dd0d50cad4f1e2566e40da75fb0a9_c291cmNlL2NvbXBhdC50eHQ= 100644
--- a/source/compat.txt
+++ b/source/compat.txt
@@ -47,7 +47,7 @@
 
 * pyglet
 
-Known differencies that are not going to be fixed:
+Known differences that are not going to be fixed:
 
 * PyPy does not support refcounting semantics. The following code
   won't fill the file immediately, but only after a certain period