diff --git a/cache/lru_cache.h b/cache/lru_cache.h
index 6313c69dba98f1d3452ac189dc8f746f960b81a3..1d9c8935c9eebd65b20e6e05c577e1e1674dac83 100644
--- a/cache/lru_cache.h
+++ b/cache/lru_cache.h
@@ -133,7 +133,6 @@ struct LRUHandle {
   // Caclculate the memory usage by metadata
   inline size_t CalcTotalCharge(
       CacheMetadataChargePolicy metadata_charge_policy) {
-    assert(key_length);
     size_t meta_charge = 0;
     if (metadata_charge_policy == kFullChargeCacheMetadata) {
 #ifdef ROCKSDB_MALLOC_USABLE_SIZE