diff --git a/.hgignore b/.hgignore
index 1b7a9019a2..09031ac0fa 100755
--- a/.hgignore
+++ b/.hgignore
@@ -17,6 +17,7 @@ build-darwin-*
 build-vc80/
 build-vc100/
 build-vc120/
+build-vc120_x64/
 indra/build-vc[0-9]*
 indra/CMakeFiles
 indra/lib/mono/1.0/*.dll