diff --git a/src/app/blog/write/action.ts b/src/app/blog/write/action.ts
index 9ddb98e..2a9ee67 100644
--- a/src/app/blog/write/action.ts
+++ b/src/app/blog/write/action.ts
@@ -14,7 +14,7 @@ export async function savePostServer(
   is_draft: boolean,
   existingSlug?: string
 ) {
-  if ((await auth())?.user != null) {
+  if ((await auth())?.user == null) {
     throw new Error("Not authenticated");
   }