diff --git a/profiler/src/Backend.hpp b/profiler/src/Backend.hpp
index f4a031bb..a2e94a8c 100644
--- a/profiler/src/Backend.hpp
+++ b/profiler/src/Backend.hpp
@@ -11,7 +11,7 @@ class RunQueue;
 class Backend
 {
 public:
-    Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, RunQueue* mainThreadTasks );
+    Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, const std::function<int(void)>& isBusy, RunQueue* mainThreadTasks );
     ~Backend();
 
     void Show();
diff --git a/profiler/src/BackendGlfw.cpp b/profiler/src/BackendGlfw.cpp
index bfe12e1d..be05d844 100644
--- a/profiler/src/BackendGlfw.cpp
+++ b/profiler/src/BackendGlfw.cpp
@@ -60,7 +60,7 @@ static void glfw_window_iconify_callback( GLFWwindow*, int iconified )
 }
 
 
-Backend::Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, RunQueue* mainThreadTasks )
+Backend::Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, const std::function<int(void)>& isBusy, RunQueue* mainThreadTasks )
 {
     glfwSetErrorCallback( glfw_error_callback );
     if( !glfwInit() ) exit( 1 );
diff --git a/profiler/src/BackendWayland.cpp b/profiler/src/BackendWayland.cpp
index a9647adc..2f1c971e 100644
--- a/profiler/src/BackendWayland.cpp
+++ b/profiler/src/BackendWayland.cpp
@@ -728,7 +728,7 @@ static void SetupCursor()
     s_cursorY = cursor->images[0]->hotspot_y * 120 / s_maxScale;
 }
 
-Backend::Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, RunQueue* mainThreadTasks )
+Backend::Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, const std::function<int(void)>& isBusy, RunQueue* mainThreadTasks )
 {
     s_redraw = redraw;
     s_scaleChanged = scaleChanged;
diff --git a/profiler/src/main.cpp b/profiler/src/main.cpp
index a79f4d6a..929e04f7 100644
--- a/profiler/src/main.cpp
+++ b/profiler/src/main.cpp
@@ -341,7 +341,7 @@ int main( int argc, char** argv )
     LoadConfig();
 
     ImGuiTracyContext imguiContext;
-    Backend backend( title, DrawContents, ScaleChanged, &mainThreadTasks );
+    Backend backend( title, DrawContents, ScaleChanged, IsBusy, &mainThreadTasks );
     tracy::InitTexture();
     iconTex = tracy::MakeTexture();
     zigzagTex = tracy::MakeTexture( true );