diff --git a/.gitignore b/.gitignore
index c2e8c279e..b7954c327 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,6 +23,7 @@
 *.pch
 *.pdb
 *.sdf
+*.opensdf
 *.so
 *.srt
 *.suo