diff --git a/main.ts b/main.ts
index c8030b8..05d6a1b 100644
--- a/main.ts
+++ b/main.ts
@@ -168,7 +168,7 @@ export default class Opener extends Plugin {
 					// - tab is linked to another tab (group), see issue #9
 					let openElsewhere = false;
 					const sameFile = file.path == app.workspace.getActiveFile()?.path;
-					const previewMode = openState?.state?.mode === 'preview';
+					const previewMode = !!openState?.state?.mode;
 					if (sameFile || previewMode || this.group) {
 						oldopenFile && oldopenFile.apply(this, [file, openState]);
 						return;