diff --git a/.gitignore b/.gitignore
index 83cf18b291..dccc084d29 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,6 @@ subunit.log
 
 # Files created by releasenotes build
 releasenotes/build
+
+# Files created by api-ref build
+api-ref/build