diff --git a/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp b/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp
index 1cc7b5eb..e71ff28b 100644
--- a/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp
+++ b/libwvdrmengine/cdm/core/src/oemcrypto_adapter_dynamic.cpp
@@ -2303,7 +2303,7 @@ extern "C" OEMCryptoResult OEMCrypto_CopyBuffer(
   LevelSession pair = gAdapter->GetSession(session);
   if (!pair.fcn) return OEMCrypto_ERROR_INVALID_SESSION;
   if (pair.fcn->CopyBuffer == nullptr) return OEMCrypto_ERROR_NOT_IMPLEMENTED;
-  return pair.fcn->CopyBuffer(session, data_addr, data_length,
+  return pair.fcn->CopyBuffer(pair.session, data_addr, data_length,
                               out_buffer_descriptor, subsample_flags);
 }