diff --git a/girder/girder_large_image/web_client/vue/components/FrameSelector.vue b/girder/girder_large_image/web_client/vue/components/FrameSelector.vue
index 30d16f553..9fb676713 100644
--- a/girder/girder_large_image/web_client/vue/components/FrameSelector.vue
+++ b/girder/girder_large_image/web_client/vue/components/FrameSelector.vue
@@ -72,6 +72,7 @@ export default Vue.extend({
                 const mergedStyle = this.maxMergeStyle();
                 if (mergedStyle.bands.length) {
                     const simpleMergedStyleString = JSON.stringify({
+                        dtype: 'source',
                         bands: mergedStyle.bands.map((b) => ({
                             framedelta: b.framedelta,
                             band: b.band