diff --git a/telephony/java/android/telephony/NetworkServiceCallback.java b/telephony/java/android/telephony/NetworkServiceCallback.java
index 92ebf367025ca..dbad02fd56408 100644
--- a/telephony/java/android/telephony/NetworkServiceCallback.java
+++ b/telephony/java/android/telephony/NetworkServiceCallback.java
@@ -83,6 +83,8 @@ public class NetworkServiceCallback {
             } catch (RemoteException e) {
                 Rlog.e(mTag, "Failed to onGetNetworkRegistrationStateComplete on the remote");
             }
+        } else {
+            Rlog.e(mTag, "Weak reference of callback is null.");
         }
     }
 }
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