diff --git a/xpcom/typelib/xpidl/.cvsignore b/xpcom/typelib/xpidl/.cvsignore
new file mode 100644
index 000000000000..8e5eac0da9da
--- /dev/null
+++ b/xpcom/typelib/xpidl/.cvsignore
@@ -0,0 +1,2 @@
+xpidl
+Makefile