diff --git a/libs/sigc++2/sigc++/adaptors/lambda/.cvsignore b/libs/sigc++2/sigc++/adaptors/lambda/.cvsignore
new file mode 100644
index 0000000000..1edeb79fd1
--- /dev/null
+++ b/libs/sigc++2/sigc++/adaptors/lambda/.cvsignore
@@ -0,0 +1 @@
+*.os