diff --git a/artiq/protocols/pyon.py b/artiq/protocols/pyon.py
index cfdaa892e..3ddef16a9 100644
--- a/artiq/protocols/pyon.py
+++ b/artiq/protocols/pyon.py
@@ -1,5 +1,5 @@
 """
-This module provide serialization and deserialization functions for Python
+This module provides serialization and deserialization functions for Python
 objects. Its main features are:
 
 * Human-readable format compatible with the Python syntax.