diff --git a/core/api/module-lib-current.txt b/core/api/module-lib-current.txt
index e6cb2402ac3ca..7aef9a6b767af 100644
--- a/core/api/module-lib-current.txt
+++ b/core/api/module-lib-current.txt
@@ -455,6 +455,14 @@ package android.provider {
 
 }
 
+package android.telecom {
+
+  public abstract class ConnectionService extends android.app.Service {
+    method @Nullable @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public android.telecom.Connection onCreateUnknownConnection(@NonNull android.telecom.PhoneAccountHandle, @NonNull android.telecom.ConnectionRequest);
+  }
+
+}
+
 package android.telephony {
 
   public abstract class CellSignalStrength {
diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index 229fd60687215..d28eaae2a9f78 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -12218,7 +12218,6 @@ package android.telecom {
 
   public abstract class ConnectionService extends android.app.Service {
     method public final void addExistingConnection(@NonNull android.telecom.PhoneAccountHandle, @NonNull android.telecom.Connection, @NonNull android.telecom.Conference);
-    method @Nullable @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public android.telecom.Connection onCreateUnknownConnection(@NonNull android.telecom.PhoneAccountHandle, @NonNull android.telecom.ConnectionRequest);
   }
 
   public abstract class InCallService extends android.app.Service {
diff --git a/telecomm/java/android/telecom/ConnectionService.java b/telecomm/java/android/telecom/ConnectionService.java
index 27d423b3bc1ea..bce6809ef32d6 100755
--- a/telecomm/java/android/telecom/ConnectionService.java
+++ b/telecomm/java/android/telecom/ConnectionService.java
@@ -3171,9 +3171,14 @@ public abstract class ConnectionService extends Service {
      *
      * {@link TelecomManager#addNewIncomingCall(PhoneAccountHandle, android.os.Bundle)}.
      *
+     * @param connectionManagerPhoneAccount The connection manager account to use for managing
+     *                                      this call
+     * @param request Details about the outgoing call
+     * @return The {@code Connection} object to satisfy this call, or the result of an invocation
+     *         of {@link Connection#createFailedConnection(DisconnectCause)} to not handle the call
      * @hide
      */
-    @SystemApi
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
     @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE)
     public @Nullable Connection onCreateUnknownConnection(
             @NonNull PhoneAccountHandle connectionManagerPhoneAccount,