diff --git a/FirebaseAuthUI/Sources/FUIAuth.m b/FirebaseAuthUI/Sources/FUIAuth.m
index 464fe959b09..0d43914ed76 100644
--- a/FirebaseAuthUI/Sources/FUIAuth.m
+++ b/FirebaseAuthUI/Sources/FUIAuth.m
@@ -201,7 +201,8 @@ - (void)signInWithProviderUI:(id<FUIAuthProvider>)providerUI
       [self.auth signInWithCredential:credential
                            completion:^(FIRAuthDataResult *_Nullable authResult,
                                         NSError *_Nullable error) {
-        if (error && error.code == FIRAuthErrorCodeAccountExistsWithDifferentCredential) {
+        if (self.emailAuthProvider && error 
+            && error.code == FIRAuthErrorCodeAccountExistsWithDifferentCredential) {
           NSString *email = error.userInfo[kErrorUserInfoEmailKey];
           [self.emailAuthProvider handleAccountLinkingForEmail:email
                                                  newCredential:credential