diff --git a/telephony/java/android/telephony/AccessNetworkConstants.java b/telephony/java/android/telephony/AccessNetworkConstants.java
index 96e715ee0495b..1d7a4761dec6c 100644
--- a/telephony/java/android/telephony/AccessNetworkConstants.java
+++ b/telephony/java/android/telephony/AccessNetworkConstants.java
@@ -62,6 +62,7 @@ public final class AccessNetworkConstants {
         switch (transportType) {
             case TRANSPORT_TYPE_WWAN: return "WWAN";
             case TRANSPORT_TYPE_WLAN: return "WLAN";
+            case TRANSPORT_TYPE_INVALID: return "INVALID";
             default: return Integer.toString(transportType);
         }
     }