diff --git a/libwvdrmengine/cdm/core/include/crypto_session.h b/libwvdrmengine/cdm/core/include/crypto_session.h
index 77799658..cc5e83bd 100644
--- a/libwvdrmengine/cdm/core/include/crypto_session.h
+++ b/libwvdrmengine/cdm/core/include/crypto_session.h
@@ -165,8 +165,7 @@ class CryptoSession {
   // Renewal request/responses
   virtual CdmResponseType PrepareAndSignRenewalRequest(
       const std::string& message, std::string* core_message,
-      std::string* signature, bool& should_specify_algorithm,
-      OEMCrypto_SignatureHashAlgorithm& algorithm);
+      std::string* signature);
   // V16 licenses.
   virtual CdmResponseType LoadRenewal(const std::string& signed_message,
                                       const std::string& core_message,
diff --git a/libwvdrmengine/cdm/core/src/crypto_session.cpp b/libwvdrmengine/cdm/core/src/crypto_session.cpp
index 5d36e53b..25b46b11 100644
--- a/libwvdrmengine/cdm/core/src/crypto_session.cpp
+++ b/libwvdrmengine/cdm/core/src/crypto_session.cpp
@@ -1121,8 +1121,7 @@ CdmResponseType CryptoSession::LoadLicense(const std::string& signed_message,
 
 CdmResponseType CryptoSession::PrepareAndSignRenewalRequest(
     const std::string& message, std::string* core_message,
-    std::string* signature, bool& should_specify_algorithm,
-    OEMCrypto_SignatureHashAlgorithm& algorithm) {
+    std::string* signature) {
   LOGV("Preparing and signing renewal request: id = %u", oec_session_id_);
   if (signature == nullptr) {
     LOGE("Output parameter |signature| not provided");
@@ -1134,19 +1133,6 @@ CdmResponseType CryptoSession::PrepareAndSignRenewalRequest(
   }
 
   OEMCryptoResult sts;
-  WithOecSessionLock("GetSignatureHashAlgorithm", [&] {
-    sts = OEMCrypto_GetSignatureHashAlgorithm(oec_session_id_, &algorithm);
-  });
-  metrics_->oemcrypto_get_signature_hash_algorithm_.Increment(sts, algorithm);
-  if (sts == OEMCrypto_SUCCESS) {
-    should_specify_algorithm = true;
-  } else if (sts == OEMCrypto_ERROR_NOT_IMPLEMENTED) {
-    should_specify_algorithm = false;
-  } else {
-    return MapOEMCryptoResult(sts, GET_SIGNATURE_HASH_ALGORITHM_ERROR_2,
-                              "PrepareAndSignRenewalRequest");
-  }
-
   size_t signature_length = 0;
   size_t core_message_length = 0;
   *core_message = "";
diff --git a/libwvdrmengine/cdm/core/src/license.cpp b/libwvdrmengine/cdm/core/src/license.cpp
index 44c63126..28271d36 100644
--- a/libwvdrmengine/cdm/core/src/license.cpp
+++ b/libwvdrmengine/cdm/core/src/license.cpp
@@ -503,11 +503,8 @@ CdmResponseType CdmLicense::PrepareKeyUpdateRequest(
   // Construct signature and core message.
   std::string core_message;
   std::string license_request_signature;
-  bool should_specify_algorithm;
-  OEMCrypto_SignatureHashAlgorithm oec_algorithm = OEMCrypto_SHA1;
   const CdmResponseType status = crypto_session_->PrepareAndSignRenewalRequest(
-      serialized_license_req, &core_message, &license_request_signature,
-      should_specify_algorithm, oec_algorithm);
+      serialized_license_req, &core_message, &license_request_signature);
   if (status != NO_ERROR) return status;
 
   if (license_request_signature.empty()) {
@@ -521,14 +518,6 @@ CdmResponseType CdmLicense::PrepareKeyUpdateRequest(
   signed_message.set_signature(license_request_signature);
   signed_message.set_msg(serialized_license_req);
   signed_message.set_oemcrypto_core_message(core_message);
-  if (should_specify_algorithm) {
-    HashAlgorithmProto proto_algorithm =
-        HashAlgorithmProto::HASH_ALGORITHM_UNSPECIFIED;
-    if (!OecAlgorithmToProtoAlgorithm(oec_algorithm, proto_algorithm)) {
-      return CdmResponseType(UNSUPPORTED_SIGNATURE_HASH_ALGORITHM_2);
-    }
-    signed_message.set_hash_algorithm(proto_algorithm);
-  }
 
   signed_message.SerializeToString(signed_request);
   *server_url = server_url_;