diff --git a/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp b/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp
index a61fa85..cee741c 100644
--- a/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp
+++ b/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.cpp
@@ -72,8 +72,7 @@
 }
 
 void AndroidInputEventProtoConverter::toProtoWindowDispatchEvent(
-        const InputTracingBackendInterface::WindowDispatchArgs& args,
-        proto::AndroidWindowInputDispatchEvent& outProto) {
+        const WindowDispatchArgs& args, proto::AndroidWindowInputDispatchEvent& outProto) {
     std::visit([&](auto entry) { outProto.set_event_id(entry.id); }, args.eventEntry);
     outProto.set_vsync_id(args.vsyncId);
     outProto.set_window_id(args.windowId);
diff --git a/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.h b/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.h
index 8a46f15..ab5f9ca 100644
--- a/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.h
+++ b/services/inputflinger/dispatcher/trace/AndroidInputEventProtoConverter.h
@@ -32,7 +32,7 @@
     static void toProtoMotionEvent(const TracedMotionEvent& event,
                                    proto::AndroidMotionEvent& outProto);
     static void toProtoKeyEvent(const TracedKeyEvent& event, proto::AndroidKeyEvent& outProto);
-    static void toProtoWindowDispatchEvent(const InputTracingBackendInterface::WindowDispatchArgs&,
+    static void toProtoWindowDispatchEvent(const WindowDispatchArgs&,
                                            proto::AndroidWindowInputDispatchEvent& outProto);
 };
 
diff --git a/services/inputflinger/dispatcher/trace/InputTracer.h b/services/inputflinger/dispatcher/trace/InputTracer.h
index 458f4aa..4ef6ca6 100644
--- a/services/inputflinger/dispatcher/trace/InputTracer.h
+++ b/services/inputflinger/dispatcher/trace/InputTracer.h
@@ -52,8 +52,6 @@
 private:
     std::unique_ptr<InputTracingBackendInterface> mBackend;
 
-    using WindowDispatchArgs = InputTracingBackendInterface::WindowDispatchArgs;
-
     // The state of a tracked event, shared across all events derived from the original event.
     struct EventState {
         explicit inline EventState(InputTracer& tracer) : tracer(tracer){};
diff --git a/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h b/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h
index 865e827..6eef12e 100644
--- a/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h
+++ b/services/inputflinger/dispatcher/trace/InputTracingBackendInterface.h
@@ -80,6 +80,20 @@
     bool isSecure;
 };
 
+/** Additional information about an input event being dispatched to a window. */
+struct WindowDispatchArgs {
+    TracedEvent eventEntry;
+    nsecs_t deliveryTime;
+    int32_t resolvedFlags;
+    gui::Uid targetUid;
+    int64_t vsyncId;
+    int32_t windowId;
+    ui::Transform transform;
+    ui::Transform rawTransform;
+    std::array<uint8_t, 32> hmac;
+    int32_t resolvedKeyRepeatCount;
+};
+
 /**
  * An interface for the tracing backend, used for setting a custom backend for testing.
  */
@@ -94,18 +108,6 @@
     virtual void traceMotionEvent(const TracedMotionEvent&, const TracedEventArgs&) = 0;
 
     /** Trace an event being sent to a window. */
-    struct WindowDispatchArgs {
-        TracedEvent eventEntry;
-        nsecs_t deliveryTime;
-        int32_t resolvedFlags;
-        gui::Uid targetUid;
-        int64_t vsyncId;
-        int32_t windowId;
-        ui::Transform transform;
-        ui::Transform rawTransform;
-        std::array<uint8_t, 32> hmac;
-        int32_t resolvedKeyRepeatCount;
-    };
     virtual void traceWindowDispatch(const WindowDispatchArgs&, const TracedEventArgs&) = 0;
 };
 
diff --git a/services/inputflinger/dispatcher/trace/ThreadedBackend.h b/services/inputflinger/dispatcher/trace/ThreadedBackend.h
index 5d4efbb..cab47af 100644
--- a/services/inputflinger/dispatcher/trace/ThreadedBackend.h
+++ b/services/inputflinger/dispatcher/trace/ThreadedBackend.h
@@ -53,8 +53,6 @@
                       TracedEventArgs>;
     std::vector<TraceEntry> mQueue GUARDED_BY(mLock);
 
-    using WindowDispatchArgs = InputTracingBackendInterface::WindowDispatchArgs;
-
     void threadLoop();
 };
 
diff --git a/services/inputflinger/tests/FakeInputTracingBackend.cpp b/services/inputflinger/tests/FakeInputTracingBackend.cpp
index dc74f84..069b50d 100644
--- a/services/inputflinger/tests/FakeInputTracingBackend.cpp
+++ b/services/inputflinger/tests/FakeInputTracingBackend.cpp
@@ -37,10 +37,9 @@
     return std::visit([](const auto& event) { return event.id; }, v);
 }
 
-MotionEvent toInputEvent(
-        const trace::TracedMotionEvent& e,
-        const trace::InputTracingBackendInterface::WindowDispatchArgs& dispatchArgs,
-        const std::array<uint8_t, 32>& hmac) {
+MotionEvent toInputEvent(const trace::TracedMotionEvent& e,
+                         const trace::WindowDispatchArgs& dispatchArgs,
+                         const std::array<uint8_t, 32>& hmac) {
     MotionEvent traced;
     traced.initialize(e.id, e.deviceId, e.source, e.displayId, hmac, e.action, e.actionButton,
                       dispatchArgs.resolvedFlags, e.edgeFlags, e.metaState, e.buttonState,
@@ -51,8 +50,7 @@
     return traced;
 }
 
-KeyEvent toInputEvent(const trace::TracedKeyEvent& e,
-                      const trace::InputTracingBackendInterface::WindowDispatchArgs& dispatchArgs,
+KeyEvent toInputEvent(const trace::TracedKeyEvent& e, const trace::WindowDispatchArgs& dispatchArgs,
                       const std::array<uint8_t, 32>& hmac) {
     KeyEvent traced;
     traced.initialize(e.id, e.deviceId, e.source, e.displayId, hmac, e.action,
@@ -120,7 +118,7 @@
 
     auto tracedDispatchesIt =
             std::find_if(mTracedWindowDispatches.begin(), mTracedWindowDispatches.end(),
-                         [&](const WindowDispatchArgs& args) {
+                         [&](const trace::WindowDispatchArgs& args) {
                              return args.windowId == expectedWindowId &&
                                      getId(args.eventEntry) == expectedEvent.getId();
                          });
@@ -181,7 +179,7 @@
     mTrace->mEventTracedCondition.notify_all();
 }
 
-void FakeInputTracingBackend::traceWindowDispatch(const WindowDispatchArgs& args,
+void FakeInputTracingBackend::traceWindowDispatch(const trace::WindowDispatchArgs& args,
                                                   const trace::TracedEventArgs&) {
     {
         std::scoped_lock lock(mTrace->mLock);
diff --git a/services/inputflinger/tests/FakeInputTracingBackend.h b/services/inputflinger/tests/FakeInputTracingBackend.h
index b149ffe..ab05d6b 100644
--- a/services/inputflinger/tests/FakeInputTracingBackend.h
+++ b/services/inputflinger/tests/FakeInputTracingBackend.h
@@ -59,8 +59,7 @@
     std::mutex mLock;
     std::condition_variable mEventTracedCondition;
     std::unordered_map<uint32_t /*eventId*/, trace::TracedEvent> mTracedEvents GUARDED_BY(mLock);
-    using WindowDispatchArgs = trace::InputTracingBackendInterface::WindowDispatchArgs;
-    std::vector<WindowDispatchArgs> mTracedWindowDispatches GUARDED_BY(mLock);
+    std::vector<trace::WindowDispatchArgs> mTracedWindowDispatches GUARDED_BY(mLock);
     std::vector<std::pair<std::variant<KeyEvent, MotionEvent>, int32_t /*windowId*/>>
             mExpectedEvents GUARDED_BY(mLock);
 
@@ -86,7 +85,7 @@
     void traceKeyEvent(const trace::TracedKeyEvent& entry, const trace::TracedEventArgs&) override;
     void traceMotionEvent(const trace::TracedMotionEvent& entry,
                           const trace::TracedEventArgs&) override;
-    void traceWindowDispatch(const WindowDispatchArgs& entry,
+    void traceWindowDispatch(const trace::WindowDispatchArgs& entry,
                              const trace::TracedEventArgs&) override;
 };