diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 35e9fb885486e9da79fb63b1460200785735a44d..cb38c27476847188aaa37051efee606052655b5a 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -36,7 +36,7 @@
 
 #define SUPPORTED_CABLE_MAX	32
 
-struct __extcon_info {
+static const struct __extcon_info {
 	unsigned int type;
 	unsigned int id;
 	const char *name;