diff --git a/line-log.c b/line-log.c
index 9510296..a23b910 100644
--- a/line-log.c
+++ b/line-log.c
@@ -43,9 +43,10 @@
 static void range_set_copy(struct range_set *dst, struct range_set *src)
 {
 	range_set_init(dst, src->nr);
-	memcpy(dst->ranges, src->ranges, src->nr*sizeof(struct range_set));
+	COPY_ARRAY(dst->ranges, src->ranges, src->nr);
 	dst->nr = src->nr;
 }
+
 static void range_set_move(struct range_set *dst, struct range_set *src)
 {
 	range_set_release(dst);