diff --git a/packages/frameworks-sveltekit/src/lib/client.ts b/packages/frameworks-sveltekit/src/lib/client.ts
index 5e708acdc3..a07cfffdb3 100644
--- a/packages/frameworks-sveltekit/src/lib/client.ts
+++ b/packages/frameworks-sveltekit/src/lib/client.ts
@@ -84,7 +84,7 @@ export async function signIn<Redirect extends boolean = true>(
     ...signInParams
   } = rest
 
-  const baseUrl = base ?? ""
+  const baseUrl = `${base}/auth`
 
   const signInUrl = `${baseUrl}/${
     provider === "credentials" ? "callback" : "signin"
@@ -150,7 +150,7 @@ export async function signOut<R extends boolean = true>(
     redirectTo = options?.callbackUrl ?? window.location.href,
   } = options ?? {}
 
-  const baseUrl = base ?? ""
+  const baseUrl = `${base}/auth`
   const res = await fetch(`${baseUrl}/signout`, {
     method: "post",
     headers: {
diff --git a/packages/frameworks-sveltekit/src/lib/webauthn.ts b/packages/frameworks-sveltekit/src/lib/webauthn.ts
index 1847ea12eb..81657e6268 100644
--- a/packages/frameworks-sveltekit/src/lib/webauthn.ts
+++ b/packages/frameworks-sveltekit/src/lib/webauthn.ts
@@ -24,7 +24,7 @@ async function webAuthnOptions(
   providerID: ProviderId,
   options?: Omit<SignInOptions, "redirect">
 ) {
-  const baseUrl = base ?? ""
+  const baseUrl = `${base}/auth`
 
   // @ts-expect-error
   const params = new URLSearchParams(options)
@@ -72,7 +72,7 @@ export async function signIn<Redirect extends boolean = true>(
     ...signInParams
   } = rest
 
-  const baseUrl = base ?? ""
+  const baseUrl = `${base}/auth`
 
   if (!provider || provider !== "webauthn") {
     // TODO: Add docs link with explanation