diff --git a/max77779_pmic.h b/max77779_pmic.h
index feedc59..f68bcde 100644
--- a/max77779_pmic.h
+++ b/max77779_pmic.h
@@ -14,6 +14,7 @@
 struct max77779_pmic_info {
 	struct device		*dev;
 	struct regmap		*regmap;
+	struct mutex		reg_dump_lock;
 #if IS_ENABLED(CONFIG_DEBUG_FS)
 	struct dentry		*de;
 	unsigned int		addr;