diff --git a/.changeset/ordered-list-type-attr-undefined.md b/.changeset/ordered-list-type-attr-undefined.md
new file mode 100644
index 000000000..90c3a6e12
--- /dev/null
+++ b/.changeset/ordered-list-type-attr-undefined.md
@@ -0,0 +1,5 @@
+---
+"@tiptap/extension-ordered-list": patch
+---
+
+fix: Use undefined for type attribute default
diff --git a/packages/extension-ordered-list/src/ordered-list.ts b/packages/extension-ordered-list/src/ordered-list.ts
index 1f9f4f975..ed2a45904 100644
--- a/packages/extension-ordered-list/src/ordered-list.ts
+++ b/packages/extension-ordered-list/src/ordered-list.ts
@@ -85,7 +85,7 @@ export const OrderedList = Node.create<OrderedListOptions>({
         },
       },
       type: {
-        default: null,
+        default: undefined,
         parseHTML: element => element.getAttribute('type'),
       },
     }