diff --git a/api/system-current.txt b/api/system-current.txt
index aea1f61804ed7..4912cf74ba5ba 100755
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -9783,7 +9783,7 @@ package android.telephony.ims {
     method public int getEmergencyServiceCategories();
     method @NonNull public java.util.List<java.lang.String> getEmergencyUrns();
     method public android.telephony.ims.ImsStreamMediaProfile getMediaProfile();
-    method @Nullable public android.os.Bundle getProprietaryCallExtras();
+    method @NonNull public android.os.Bundle getProprietaryCallExtras();
     method public int getRestrictCause();
     method public int getServiceType();
     method public static int getVideoStateFromCallType(int);
diff --git a/api/test-current.txt b/api/test-current.txt
index f4a02fab227d4..43892a8016dc7 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -3326,7 +3326,7 @@ package android.telephony.ims {
     method public int getEmergencyServiceCategories();
     method @NonNull public java.util.List<java.lang.String> getEmergencyUrns();
     method public android.telephony.ims.ImsStreamMediaProfile getMediaProfile();
-    method @Nullable public android.os.Bundle getProprietaryCallExtras();
+    method @NonNull public android.os.Bundle getProprietaryCallExtras();
     method public int getRestrictCause();
     method public int getServiceType();
     method public static int getVideoStateFromCallType(int);
diff --git a/telephony/java/android/telephony/ims/ImsCallProfile.java b/telephony/java/android/telephony/ims/ImsCallProfile.java
index 9e466aea97764..1e8fdceac1e6c 100644
--- a/telephony/java/android/telephony/ims/ImsCallProfile.java
+++ b/telephony/java/android/telephony/ims/ImsCallProfile.java
@@ -18,7 +18,6 @@ package android.telephony.ims;
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
-import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
 import android.compat.annotation.UnsupportedAppUsage;
@@ -721,11 +720,16 @@ public final class ImsCallProfile implements Parcelable {
      * @return A {@link Bundle} containing proprietary call extras that were not set by the
      * platform.
      */
-    public @Nullable Bundle getProprietaryCallExtras() {
+    public @NonNull Bundle getProprietaryCallExtras() {
         if (mCallExtras == null) {
-            return null;
+            return new Bundle();
         }
-        return mCallExtras.getBundle(EXTRA_OEM_EXTRAS);
+        Bundle proprietaryExtras = mCallExtras.getBundle(EXTRA_OEM_EXTRAS);
+        if (proprietaryExtras == null) {
+            return new Bundle();
+        }
+        // Make a copy so users do not accidentally change this copy of the extras.
+        return new Bundle(proprietaryExtras);
     }
 
     public ImsStreamMediaProfile getMediaProfile() {