diff --git a/engine/src/flutter/tools/debugger/debugger.cc b/engine/src/flutter/tools/debugger/debugger.cc
index e4aa111a0ab..29bae26af7e 100644
--- a/engine/src/flutter/tools/debugger/debugger.cc
+++ b/engine/src/flutter/tools/debugger/debugger.cc
@@ -85,8 +85,8 @@ class SkyDebugger : public mojo::ApplicationDelegate,
   }
 
   virtual void OnViewBoundsChanged(mojo::View* view,
-                                   const gfx::Rect& old_bounds,
-                                   const gfx::Rect& new_bounds) override {
+                                   const mojo::Rect& old_bounds,
+                                   const mojo::Rect& new_bounds) override {
     content_->SetBounds(new_bounds);
   }
 
diff --git a/engine/src/flutter/tools/tester/tester.cc b/engine/src/flutter/tools/tester/tester.cc
index 051236a7866..fd1f4ff45c2 100644
--- a/engine/src/flutter/tools/tester/tester.cc
+++ b/engine/src/flutter/tools/tester/tester.cc
@@ -77,8 +77,8 @@ class SkyTester : public mojo::ApplicationDelegate,
   }
 
   virtual void OnViewBoundsChanged(mojo::View* view,
-                                   const gfx::Rect& old_bounds,
-                                   const gfx::Rect& new_bounds) override {
+                                   const mojo::Rect& old_bounds,
+                                   const mojo::Rect& new_bounds) override {
     content_->SetBounds(new_bounds);
   }