diff --git a/drivers/mfd/stw481x.c b/drivers/mfd/stw481x.c
index 1243d5c6a448568e2b1166ae34ab7e61b16e78de..cc42f88586f65e8a5f5e9ea68a20859158a0f94c 100644
--- a/drivers/mfd/stw481x.c
+++ b/drivers/mfd/stw481x.c
@@ -167,7 +167,7 @@ static struct mfd_cell stw481x_cells[] = {
 	},
 };
 
-const struct regmap_config stw481x_regmap_config = {
+static const struct regmap_config stw481x_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 };