diff --git a/libwvdrmengine/cdm/core/include/cdm_session.h b/libwvdrmengine/cdm/core/include/cdm_session.h
index 593eb191..a608cc30 100644
--- a/libwvdrmengine/cdm/core/include/cdm_session.h
+++ b/libwvdrmengine/cdm/core/include/cdm_session.h
@@ -138,7 +138,6 @@ class CdmSession {
   bool is_release_;
   CdmSecurityLevel security_level_;
   SecurityLevel requested_security_level_;
-  std::string app_id_;
 
   // decryption and usage flags
   bool is_initial_decryption_;