diff --git a/blocksuite/affine/shared/src/utils/dom/checker.ts b/blocksuite/affine/shared/src/utils/dom/checker.ts
index c06576fb6..fee17459d 100644
--- a/blocksuite/affine/shared/src/utils/dom/checker.ts
+++ b/blocksuite/affine/shared/src/utils/dom/checker.ts
@@ -7,6 +7,8 @@ export function isInsidePageEditor(host: EditorHost) {
 }
 
 export function isInsideEdgelessEditor(host: EditorHost) {
+  if (!host) return false;
+
   return Array.from(host.children).some(
     v =>
       v.tagName.toLowerCase() === 'affine-edgeless-root' ||