diff --git a/libwvdrmengine/include/mapErrors-inl.h b/libwvdrmengine/include/mapErrors-inl.h
index ee3b3a5f..0e223c33 100644
--- a/libwvdrmengine/include/mapErrors-inl.h
+++ b/libwvdrmengine/include/mapErrors-inl.h
@@ -343,6 +343,8 @@ static android::status_t mapCdmResponseType(wvcdm::CdmResponseType res) {
       return kEmptyLicenseRequest;
     case wvcdm::UNKNOWN_ERROR:
       return android::ERROR_DRM_UNKNOWN;
+    case wvcdm::UNUSED_1:
+      return android::UNKNOWN_ERROR;
   }
 
   // Return here instead of as a default case so that the compiler will warn