diff --git a/doc/src/sgml/.gitignore b/doc/src/sgml/.gitignore
index a74513837f..a72b7ccb06 100644
--- a/doc/src/sgml/.gitignore
+++ b/doc/src/sgml/.gitignore
@@ -20,3 +20,5 @@
 /postgres.xml
 /INSTALL.html
 /INSTALL.xml
+/postgres-US.fo
+/postgres-A4.fo