diff --git a/src/viewport-three/ViewportCanvas.tsx b/src/viewport-three/ViewportCanvas.tsx
index 24b46a06..7dd94225 100644
--- a/src/viewport-three/ViewportCanvas.tsx
+++ b/src/viewport-three/ViewportCanvas.tsx
@@ -39,6 +39,7 @@ interface ViewportCanvasProps {
   focusSelection: EditorSelection;
   onSelectionChange(selection: EditorSelection): void;
   onCreateBoxBrush(center: Vec3): void;
+  onCommitPlacement(toolPreview: PlacementViewportToolPreview): void;
   onToolPreviewChange(toolPreview: ViewportToolPreview): void;
 }