diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index 223829655d64b40fd6534220beec47ff1306bb4e..89b6468da2b9b0d595a34bbcf4ded9231f80c2ad 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -232,13 +232,19 @@ static int damon_va_three_regions(struct damon_target *t,
 static void __damon_va_init_regions(struct damon_ctx *ctx,
 				     struct damon_target *t)
 {
+	struct damon_target *ti;
 	struct damon_region *r;
 	struct damon_addr_range regions[3];
 	unsigned long sz = 0, nr_pieces;
-	int i;
+	int i, tidx = 0;
 
 	if (damon_va_three_regions(t, regions)) {
-		pr_debug("Failed to get three regions of target %lu\n", t->id);
+		damon_for_each_target(ti, ctx) {
+			if (ti == t)
+				break;
+			tidx++;
+		}
+		pr_debug("Failed to get three regions of %dth target\n", tidx);
 		return;
 	}