diff --git a/VERSION b/VERSION
index 9ab8337f3..587dbef01 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.9.1
+1.9.1-clear-containers
diff --git a/daemon/config_unix.go b/daemon/config_unix.go
index 3ae67cac5..237cda891 100644
--- a/daemon/config_unix.go
+++ b/daemon/config_unix.go
@@ -13,7 +13,7 @@ import (
 var (
 	defaultPidFile = "/var/run/docker.pid"
 	defaultGraph   = "/var/lib/docker"
-	defaultExec    = "native"
+	defaultExec    = "clr"
 )
 
 // Config defines the configuration of a docker daemon.