diff --git a/table/filter_block.cc b/table/filter_block.cc
index d7be78e1c..7d1bfccaa 100644
--- a/table/filter_block.cc
+++ b/table/filter_block.cc
@@ -82,7 +82,6 @@ void FilterBlockBuilder::AddKey(const Slice& key) {
       Slice prefix = prefix_extractor_->Transform(user_key);
       InternalKey internal_prefix_tmp(prefix, 0, kTypeValue);
       Slice internal_prefix = internal_prefix_tmp.Encode();
-      assert(comparator_->Compare(internal_prefix, key) <= 0);
       start_.push_back(entries_.size());
       entries_.append(internal_prefix.data(), internal_prefix.size());
     }