1 files changed, 1 insertions, 1 deletions
diff --git a/src/zset.c b/src/zset.c
index b67fe4a..f7fe52e 100644
--- a/src/zset.c
+++ b/src/zset.c
@@ -8,7 +8,7 @@ zset(z_t a, z_t b)
 	if (zzero(b)) {
 		SET_SIGNUM(a, 0);
 	} else {
-		ENSURE_SIZE(a, b->alloced);
+		ENSURE_SIZE(a, b->used);
 		a->sign = b->sign;
 		a->used = b->used;
 		zmemcpy(a->chars, b->chars, b->used);