diff --git a/lib/pages/preview/view.dart b/lib/pages/preview/view.dart
index 7dcc914f3..e57c34052 100644
--- a/lib/pages/preview/view.dart
+++ b/lib/pages/preview/view.dart
@@ -147,6 +147,7 @@ class _ImagePreviewState extends State<ImagePreview>
                 onPageChanged: (int index) =>
                     _previewController.onChange(index),
                 canScrollPage: (GestureDetails? gestureDetails) =>
+                    gestureDetails?.totalScale == null ||
                     gestureDetails!.totalScale! <= 1.0,
                 itemCount: widget.imgList!.length,
                 itemBuilder: (BuildContext context, int index) {