diff --git a/table/cuckoo_table_builder.cc b/table/cuckoo_table_builder.cc
index e92ef3735..223acbf52 100644
--- a/table/cuckoo_table_builder.cc
+++ b/table/cuckoo_table_builder.cc
@@ -40,7 +40,6 @@ CuckooTableBuilder::CuckooTableBuilder(
       unsigned int))
     : num_hash_table_(std::min((unsigned int) 4, max_num_hash_table)),
       file_(file),
-      key_length_(fixed_key_length),
       value_length_(fixed_value_length),
       bucket_size_(fixed_key_length + fixed_value_length),
       hash_table_ratio_(hash_table_ratio),
diff --git a/table/cuckoo_table_builder.h b/table/cuckoo_table_builder.h
index baee9a48a..904bb5248 100644
--- a/table/cuckoo_table_builder.h
+++ b/table/cuckoo_table_builder.h
@@ -69,7 +69,6 @@ class CuckooTableBuilder: public TableBuilder {
 
   unsigned int num_hash_table_;
   WritableFile* file_;
-  const unsigned int key_length_;
   const unsigned int value_length_;
   const unsigned int bucket_size_;
   const double hash_table_ratio_;