1 files changed, 3 insertions, 1 deletions
diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
index 89e0450d7..2783011cf 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormView.tsx
@@ -927,7 +927,9 @@ export class CollectionFreeFormView extends CollectionSubView<PanZoomDocument, P
     }
 
     setScaleToZoom = (doc: Doc, scale: number = 0.75) => {
-        this.Document[this.scaleFieldKey] = scale * Math.min(this.props.PanelWidth() / NumCast(doc._width), this.props.PanelHeight() / NumCast(doc._height));
+        const pw = this.props.PanelWidth();
+        const ph = this.props.PanelHeight();
+        pw && ph && (this.Document[this.scaleFieldKey] = scale * Math.min(pw / NumCast(doc._width), ph / NumCast(doc._height)));
     }
 
     @computed get libraryPath() { return this.props.LibraryPath ? [...this.props.LibraryPath, this.props.Document] : []; }