diff --git a/common/globalvar.c b/common/globalvar.c
index 32ca6a2..ebc5e83 100644
--- a/common/globalvar.c
+++ b/common/globalvar.c
@@ -19,7 +19,7 @@
 	.id = DEVICE_ID_SINGLE,
 };
 
-struct device_d nv_device = {
+static struct device_d nv_device = {
 	.name = "nv",
 	.id = DEVICE_ID_SINGLE,
 };