diff --git a/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
index 79b09fd..225b127 100644
--- a/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
+++ b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
@@ -220,6 +220,11 @@
                 }
             });
         }
+
+        @Override
+        public void setTriggerBack(boolean triggerBack) {
+            // TODO(b/261654570): track touch from the Launcher process.
+        }
     }
 
     private static class RemoteAnimationRunnerStub extends IRemoteAnimationRunner.Stub {