diff --git a/.cvsignore b/.cvsignore
index fb1c90470..6192d8d9d 100644
--- a/.cvsignore
+++ b/.cvsignore
@@ -2,6 +2,7 @@
 dist
 *.el
 *.ipr
+*.iws
 build.number
 log*.*
 *.log