diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 686ef270ecf7f01d23bf84a85b5f512be4566f10..b60a4c9f8f1680153e7c66c9c6fb5c72ec022dac 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -661,7 +661,7 @@ static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state)
 static void print_constraints(struct regulator_dev *rdev)
 {
 	struct regulation_constraints *constraints = rdev->constraints;
-	char buf[80];
+	char buf[80] = "";
 	int count = 0;
 	int ret;