diff --git a/src-ui/src/app/components/document-detail/document-detail.component.html b/src-ui/src/app/components/document-detail/document-detail.component.html
index 1286225fb..989c998f1 100644
--- a/src-ui/src/app/components/document-detail/document-detail.component.html
+++ b/src-ui/src/app/components/document-detail/document-detail.component.html
@@ -139,7 +139,7 @@
                 <pdf-viewer [src]="previewUrl" [original-size]="false" [show-borders]="true" [show-all]="true" [(page)]="previewCurrentPage" [render-text-mode]="2" (after-load-complete)="pdfPreviewLoaded($event)"></pdf-viewer>
             </div>
             <ng-template #nativePdfViewer>
-                <object [data]="previewUrl | safe" type="application/pdf" class="preview-sticky" width="100%"></object>
+                <object [data]="previewUrl | safe" class="preview-sticky" width="100%"></object>
             </ng-template>
         </ng-container>
         <ng-container *ngIf="getContentType() == 'text/plain'">