diff --git a/auth/credentials/credentials.c b/auth/credentials/credentials.c
index 1a4ec535b44..105c73c141b 100644
--- a/auth/credentials/credentials.c
+++ b/auth/credentials/credentials.c
@@ -959,8 +959,9 @@ _PUBLIC_ void cli_credentials_guess(struct cli_credentials *cred,
  * Attach NETLOGON credentials for use with SCHANNEL
  */
 
-_PUBLIC_ void cli_credentials_set_netlogon_creds(struct cli_credentials *cred, 
-						 struct netlogon_creds_CredentialState *netlogon_creds)
+_PUBLIC_ void cli_credentials_set_netlogon_creds(
+	struct cli_credentials *cred,
+	const struct netlogon_creds_CredentialState *netlogon_creds)
 {
 	TALLOC_FREE(cred->netlogon_creds);
 	if (netlogon_creds == NULL) {
diff --git a/auth/credentials/credentials.h b/auth/credentials/credentials.h
index e75694a4b16..9fe6a82b1ea 100644
--- a/auth/credentials/credentials.h
+++ b/auth/credentials/credentials.h
@@ -158,8 +158,9 @@ void cli_credentials_set_secure_channel_type(struct cli_credentials *cred,
 				     enum netr_SchannelType secure_channel_type);
 void cli_credentials_set_password_last_changed_time(struct cli_credentials *cred,
 							     time_t last_change_time);
-void cli_credentials_set_netlogon_creds(struct cli_credentials *cred, 
-					struct netlogon_creds_CredentialState *netlogon_creds);
+void cli_credentials_set_netlogon_creds(
+	struct cli_credentials *cred,
+	const struct netlogon_creds_CredentialState *netlogon_creds);
 NTSTATUS cli_credentials_set_krb5_context(struct cli_credentials *cred, 
 					  struct smb_krb5_context *smb_krb5_context);
 NTSTATUS cli_credentials_set_stored_principal(struct cli_credentials *cred,