diff --git a/libwvdrmengine/cdm/core/include/wv_cdm_constants.h b/libwvdrmengine/cdm/core/include/wv_cdm_constants.h
index 800c55b1..3c49ff5d 100644
--- a/libwvdrmengine/cdm/core/include/wv_cdm_constants.h
+++ b/libwvdrmengine/cdm/core/include/wv_cdm_constants.h
@@ -52,6 +52,8 @@ constexpr uint32_t RESOURCE_RATING_TIER_MAX = RESOURCE_RATING_TIER_VERY_HIGH;
 // OEMCrypto features by version
 constexpr uint32_t OEM_CRYPTO_API_VERSION_SUPPORTS_RESOURCE_RATING_TIER = 15;
 constexpr uint32_t OEM_CRYPTO_API_VERSION_SUPPORTS_PROV40_CORE_MESSAGE = 18;
+constexpr uint32_t OEM_CRYPTO_API_VERSION_SUPPORTS_INITIAL_RENEWAL_DELAY_BASE =
+    18;
 
 constexpr char SESSION_ID_PREFIX[] = "sid";
 constexpr char ATSC_KEY_SET_ID_PREFIX[] = "atscksid";
diff --git a/libwvdrmengine/cdm/core/src/client_identification.cpp b/libwvdrmengine/cdm/core/src/client_identification.cpp
index a9a363ee..0bc07bf4 100644
--- a/libwvdrmengine/cdm/core/src/client_identification.cpp
+++ b/libwvdrmengine/cdm/core/src/client_identification.cpp
@@ -364,6 +364,11 @@ CdmResponseType ClientIdentification::Prepare(
     }
   }
 
+  if (api_version >=
+      OEM_CRYPTO_API_VERSION_SUPPORTS_INITIAL_RENEWAL_DELAY_BASE) {
+    client_capabilities->set_initial_renewal_delay_base(true);
+  }
+
   return CdmResponseType(NO_ERROR);
 }
 
diff --git a/libwvdrmengine/cdm/core/src/license_protocol.proto b/libwvdrmengine/cdm/core/src/license_protocol.proto
index 1d0ec510..25ede138 100644
--- a/libwvdrmengine/cdm/core/src/license_protocol.proto
+++ b/libwvdrmengine/cdm/core/src/license_protocol.proto
@@ -1149,6 +1149,9 @@ message ClientIdentification {
     // Support is optional.
     // Value is only required to be set for license requests.
     optional WatermarkingSupport watermarking_support = 13;
+    // Indicate whether or not `initial_renewal_delay_base` is supported by the
+    // client.
+    optional bool initial_renewal_delay_base = 14 [default = false];
   }
 
   message ClientCredentials {