diff --git a/src/crypto/crypto_keys.cc b/src/crypto/crypto_keys.cc
index 7ef924d88fdca0..4c6946ddfbedd2 100644
--- a/src/crypto/crypto_keys.cc
+++ b/src/crypto/crypto_keys.cc
@@ -843,7 +843,6 @@ KeyObjectData::KeyObjectData(
     ByteSource symmetric_key)
     : key_type_(KeyType::kKeyTypeSecret),
       symmetric_key_(std::move(symmetric_key)),
-      symmetric_key_len_(symmetric_key_.size()),
       asymmetric_key_() {}
 
 KeyObjectData::KeyObjectData(
@@ -851,7 +850,6 @@ KeyObjectData::KeyObjectData(
     const ManagedEVPPKey& pkey)
     : key_type_(type),
       symmetric_key_(),
-      symmetric_key_len_(0),
       asymmetric_key_{pkey} {}
 
 void KeyObjectData::MemoryInfo(MemoryTracker* tracker) const {
@@ -896,7 +894,7 @@ const char* KeyObjectData::GetSymmetricKey() const {
 
 size_t KeyObjectData::GetSymmetricKeySize() const {
   CHECK_EQ(key_type_, kKeyTypeSecret);
-  return symmetric_key_len_;
+  return symmetric_key_.size();
 }
 
 v8::Local<v8::Function> KeyObjectHandle::Initialize(Environment* env) {
diff --git a/src/crypto/crypto_keys.h b/src/crypto/crypto_keys.h
index 3889f3f321da45..7b9c8d7e4ff55f 100644
--- a/src/crypto/crypto_keys.h
+++ b/src/crypto/crypto_keys.h
@@ -158,7 +158,6 @@ class KeyObjectData : public MemoryRetainer {
 
   const KeyType key_type_;
   const ByteSource symmetric_key_;
-  const unsigned int symmetric_key_len_;
   const ManagedEVPPKey asymmetric_key_;
 };