diff --git a/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.cpp b/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.cpp
index 8bd4ac0a7f20a..6b7ec4eb8a3ec 100644
--- a/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.cpp
+++ b/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.cpp
@@ -84,6 +84,8 @@ LayerTreeHost::LayerTreeHost(WebPage& webPage)
     m_layerTreeContext.contextID = m_surface->surfaceID();
 
     didChangeViewport();
+
+    initialized.store(true);
 }
 
 LayerTreeHost::~LayerTreeHost()
@@ -394,7 +396,9 @@ void LayerTreeHost::updateScene()
 
 void LayerTreeHost::frameComplete()
 {
-    m_compositor->frameComplete();
+    if (initialized.load()) {
+        m_compositor->frameComplete();
+    }
 }
 
 uint64_t LayerTreeHost::nativeSurfaceHandleForCompositing()
diff --git a/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.h b/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.h
index f06382c5b5d3b..076a3979bb3f6 100644
--- a/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.h
+++ b/Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/LayerTreeHost.h
@@ -37,6 +37,7 @@
 #include <wtf/Forward.h>
 #include <wtf/OptionSet.h>
 #include <wtf/RunLoop.h>
+#include <atomic>
 
 #if USE(GRAPHICS_LAYER_TEXTURE_MAPPER)
 
@@ -220,6 +221,7 @@ class LayerTreeHost
     double m_transientZoomScale { 1 };
     WebCore::FloatPoint m_transientZoomOrigin;
 #endif
+    std::atomic_bool initialized { false };
 };
 
 #if !USE(COORDINATED_GRAPHICS)