diff --git a/utilities/write_batch_with_index/write_batch_with_index.cc b/utilities/write_batch_with_index/write_batch_with_index.cc
index 67a369c8b..83b07f4db 100644
--- a/utilities/write_batch_with_index/write_batch_with_index.cc
+++ b/utilities/write_batch_with_index/write_batch_with_index.cc
@@ -459,8 +459,8 @@ void WriteBatchWithIndex::Rep::AddNewEntry(uint32_t column_family_id) {
                           wb_data.size() - last_entry_offset);
   // Extract key
   Slice key;
-  bool success =
-    ReadKeyFromWriteBatchEntry(&entry_ptr, &key, column_family_id != 0);
+  bool success __attribute__((__unused__)) =
+      ReadKeyFromWriteBatchEntry(&entry_ptr, &key, column_family_id != 0);
   assert(success);
 
     auto* mem = arena.Allocate(sizeof(WriteBatchIndexEntry));