diff --git a/proto/telecom.proto b/proto/telecom.proto
index 06dd394..9fd64db 100644
--- a/proto/telecom.proto
+++ b/proto/telecom.proto
@@ -17,6 +17,7 @@
 
 message LogSessionTiming {
   enum SessionEntryPoint {
+    ENTRY_POINT_UNSPECIFIED = 0;
     ICA_ANSWER_CALL = 1;
     ICA_REJECT_CALL = 2;
     ICA_DISCONNECT_CALL = 3;
@@ -46,6 +47,7 @@
 message Event {
   // From android.telecom.ParcelableAnalytics
   enum EventName {
+    EVENT_NAME_UNSPECIFIED = 9999;
     SET_SELECT_PHONE_ACCOUNT = 0;
     SET_ACTIVE = 1;
     SET_DISCONNECTED = 2;
@@ -100,6 +102,7 @@
 message VideoEvent {
   // From android.telecom.ParcelableCallAnalytics
   enum VideoEventName {
+    VIDEO_EVENT_NAME_UNSPECIFIED = 9999;
     SEND_LOCAL_SESSION_MODIFY_REQUEST = 0;
     SEND_LOCAL_SESSION_MODIFY_RESPONSE = 1;
     RECEIVE_REMOTE_SESSION_MODIFY_REQUEST = 2;
@@ -108,11 +111,12 @@
 
   // From android.telecom.VideoProfile
   enum VideoState {
-     STATE_AUDIO_ONLY = 0;
-     STATE_TX_ENABLED = 1;
-     STATE_RX_ENABLED = 2;
-     STATE_BIDIRECTIONAL = 3;
-     STATE_PAUSED = 4;
+    // No unspecified field to define. This enum to be used only as values for a bitmask.
+    STATE_AUDIO_ONLY = 0;
+    STATE_TX_ENABLED = 1;
+    STATE_RX_ENABLED = 2;
+    STATE_BIDIRECTIONAL = 3;
+    STATE_PAUSED = 4;
   }
 
   // The ID of the event.
@@ -128,6 +132,7 @@
 
 message EventTimingEntry {
   enum EventTimingName {
+    EVENT_TIMING_NAME_UNSPECIFIED = 9999;
     ACCEPT_TIMING = 0;
     REJECT_TIMING = 1;
     DISCONNECT_TIMING = 2;
@@ -152,6 +157,7 @@
 message InCallServiceInfo {
   // Keep this up-to-date with com.android.server.telecom.InCallController.
   enum InCallServiceType {
+    IN_CALL_SERVICE_TYPE_UNSPECIFIED = 9999;
     IN_CALL_SERVICE_TYPE_INVALID = 0;
     IN_CALL_SERVICE_TYPE_DIALER_UI = 1;
     IN_CALL_SERVICE_TYPE_SYSTEM_UI = 2;