diff --git a/mm/damon/core.c b/mm/damon/core.c
index e6f0f7a6752d..fcd7347e48e3 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -266,6 +266,9 @@ unsigned int damon_nr_accesses_mvsum(struct damon_region *r,
 			ctx->passed_sample_intervals;
 	left_window_bp = mult_frac(left_window, 10000, window_len);
 
+	if (left_window_bp == 10000)
+		return r->last_nr_accesses;
+
 	return damon_mvsum(r->nr_accesses, r->last_nr_accesses,
 			left_window_bp);
 }