diff --git a/frontend/src/pages/pam/PamAccountsPage/components/PamAccountForm/shared/sql-account-schemas.ts b/frontend/src/pages/pam/PamAccountsPage/components/PamAccountForm/shared/sql-account-schemas.ts
index 4d40c78e9..4a681bde1 100644
--- a/frontend/src/pages/pam/PamAccountsPage/components/PamAccountForm/shared/sql-account-schemas.ts
+++ b/frontend/src/pages/pam/PamAccountsPage/components/PamAccountForm/shared/sql-account-schemas.ts
@@ -1,6 +1,6 @@
 import { z } from "zod";
 
 export const BaseSqlAccountSchema = z.object({
-  username: z.string().trim().min(1, "Username required"),
+  username: z.string().trim().min(1, "Username required").max(255, "Username must be 255 characters or less"),
   password: z.string().trim().min(1, "Password required")
 });