diff --git a/aiocache/base.py b/aiocache/base.py
index 54e9d18c..4f63ccdb 100644
--- a/aiocache/base.py
+++ b/aiocache/base.py
@@ -315,7 +315,7 @@ async def multi_set(self, pairs, ttl=SENTINEL, dumps_fn=None, namespace=None, _c
         logger.debug(
             "MULTI_SET %s %d (%.4f)s",
             [key for key, value in tmp_pairs],
-            len(pairs),
+            len(tmp_pairs),
             time.monotonic() - start,
         )
         return True