diff --git a/.cvsignore b/.cvsignore
index 5528a05ee7..564c1906a7 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -20,6 +20,7 @@ linux-gnu.system.cache
 *.opt
 *.d
 *.swp
+*.swo
 Release
 Debug
 ReleaseDLL