diff --git a/Makefile b/Makefile
index c1f87db..4d13dea 100644
--- a/Makefile
+++ b/Makefile
@@ -12,6 +12,7 @@
 
 DISABLE_DEBUG := 0
 DISABLE_MSC   := 0
+CDC_LOOPBACK_TEST := 0
 
 include User/gex.mk
 GEX_PLAT=F072_DISCOVERY
diff --git a/User b/User
index 94e87c7..a63f040 160000
--- a/User
+++ b/User
@@ -1 +1 @@
-Subproject commit 94e87c74d30c4a55bd84c648670f87a7a475ce6e
+Subproject commit a63f04027178433015830012ae9caf495a409b97