diff --git a/.gitignore b/.gitignore
index bcc24b9f1fcd26113792589d865c9b46a632afef..e38a0bd599723aa5eafdad96980bc566d075591e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 *.vo
+*.vio
 *.v.d
 *.glob
 *.cache