diff --git a/.gitignore b/.gitignore
index e9832b583..2644ca342 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@ spacy/syntax/*.cpp
 spacy/syntax/*.html
 spacy/en/*.cpp
 spacy/tokens/*.cpp
+spacy/serialize/*.cpp
 spacy/en/data/*
 spacy/*.cpp
 spacy/ner/*.cpp