diff --git a/cranelift/.gitignore b/cranelift/.gitignore
index a481ff48e8..041b7ad3a8 100644
--- a/cranelift/.gitignore
+++ b/cranelift/.gitignore
@@ -10,3 +10,4 @@ Cargo.lock
 cretonne.dbg*
 .mypy_cache
 rusty-tags.*
+docs/_build