diff --git a/types/forge-viewer/index.d.ts b/types/forge-viewer/index.d.ts
index e8f43acec9..5a6a27a077 100644
--- a/types/forge-viewer/index.d.ts
+++ b/types/forge-viewer/index.d.ts
@@ -325,6 +325,7 @@ declare namespace Autodesk {
           findParentGeom2Dor3D(): BubbleNode;
           findPropertyDbPath(): string;
           findViewableParent(): BubbleNode;
+          getDefaultGeometry(): any;
           getLodNode(): boolean;
           getNamedViews(): string[];
           getPlacementTransform(): object;