diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index dbf5e4de97a0..9ea21b6d266b 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -2210,7 +2210,7 @@ static int damon_sysfs_update_target(struct damon_target *target,
 		struct damon_ctx *ctx,
 		struct damon_sysfs_target *sys_target)
 {
-	int err;
+	int err = 0;
 
 	if (damon_target_has_pid(ctx)) {
 		err = damon_sysfs_update_target_pid(target, sys_target->pid);