diff --git a/mobile/lib/presentation/widgets/images/one_frame_multi_image_stream_completer.dart b/mobile/lib/presentation/widgets/images/one_frame_multi_image_stream_completer.dart
index 43ecd04d10..851ed59220 100644
--- a/mobile/lib/presentation/widgets/images/one_frame_multi_image_stream_completer.dart
+++ b/mobile/lib/presentation/widgets/images/one_frame_multi_image_stream_completer.dart
@@ -35,7 +35,7 @@ class OneFramePlaceholderImageStreamCompleter extends ImageStreamCompleter {
     );
   }
 
-  _onImage(ImageInfo image) {
+  void _onImage(ImageInfo image) {
     setImage(image);
     _initialImage?.dispose();
     _initialImage = null;