diff --git a/.hgignore b/.hgignore
index ba330ac6..eaca50f6 100644
--- a/.hgignore
+++ b/.hgignore
@@ -17,6 +17,7 @@ syntax: regexp
 ^tests/dstress
 ^tests/reference
 ^tango
+^druntime
 ^import
 ^bin/ldc
 ^idgen