diff --git a/mm/damon/core.c b/mm/damon/core.c
index 43e4fe7ef17e..48747236c21c 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1043,6 +1043,10 @@ static void damos_adjust_quota(struct damon_ctx *c, struct damos *s)
 	if (!quota->ms && !quota->sz)
 		return;
 
+	/* First charge window */
+	if (!quota->total_charged_sz && !quota->charged_from)
+		quota->charged_from = jiffies;
+
 	/* New charge window starts */
 	if (time_after_eq(jiffies, quota->charged_from +
 				msecs_to_jiffies(quota->reset_interval))) {