diff --git a/unix/.gitignore b/unix/.gitignore
index 1d94544e7c15130958afcdd243ce2d68f465145e..b93755326f0fdf85b51259d66a25ea285010acd6 100644
--- a/unix/.gitignore
+++ b/unix/.gitignore
@@ -7,3 +7,4 @@ micropython_fast
 micropython_minimal
 micropython_coverage
 *.py
+*.gcov