diff --git a/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/credentials.kt b/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/credentials.kt
index 365fee8ce..ce052392f 100644
--- a/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/credentials.kt
+++ b/firebase-auth/src/iosMain/kotlin/dev/gitlive/firebase/auth/credentials.kt
@@ -84,7 +84,7 @@ actual class PhoneAuthProvider(val ios: FIRPhoneAuthProvider) {
 }
 
 actual interface PhoneVerificationProvider {
-    val delegate: FIRAuthUIDelegateProtocol
+    val delegate: FIRAuthUIDelegateProtocol?
     suspend fun getVerificationCode(): String
 }