diff --git a/drivers/staging/android/timed_output.c b/drivers/staging/android/timed_output.c
index 62e79180421b..f373422308e0 100644
--- a/drivers/staging/android/timed_output.c
+++ b/drivers/staging/android/timed_output.c
@@ -41,7 +41,9 @@ static ssize_t enable_store(
 	struct timed_output_dev *tdev = dev_get_drvdata(dev);
 	int value;
 
-	sscanf(buf, "%d", &value);
+	if (sscanf(buf, "%d", &value) != 1)
+		return -EINVAL;
+
 	tdev->enable(tdev, value);
 
 	return size;