diff --git a/.changeset/big-rocks-scream.md b/.changeset/big-rocks-scream.md
new file mode 100644
index 00000000000..77587e93591
--- /dev/null
+++ b/.changeset/big-rocks-scream.md
@@ -0,0 +1,6 @@
+---
+"@firebase/auth-compat": patch
+"@firebase/auth": patch
+---
+
+Add SAMLAuthProvider to the compatability layer (it was missing before)
diff --git a/packages/auth-compat/index.ts b/packages/auth-compat/index.ts
index 6ed7faf829b..2cf2cabffe7 100644
--- a/packages/auth-compat/index.ts
+++ b/packages/auth-compat/index.ts
@@ -101,7 +101,7 @@ function registerAuthCompat(instance: _FirebaseNamespace): void {
         GithubAuthProvider: impl.GithubAuthProvider,
         GoogleAuthProvider: impl.GoogleAuthProvider,
         OAuthProvider: impl.OAuthProvider,
-        //   SAMLAuthProvider,
+        SAMLAuthProvider: impl.SAMLAuthProvider,
         PhoneAuthProvider: CompatAuthProvider,
         PhoneMultiFactorGenerator: impl.PhoneMultiFactorGenerator,
         RecaptchaVerifier: CompatRecaptchaVerifier,