diff --git a/lib/gssapi/ntlm/crypto.c b/lib/gssapi/ntlm/crypto.c
index 383ecbf0a..33d6df73b 100644
--- a/lib/gssapi/ntlm/crypto.c
+++ b/lib/gssapi/ntlm/crypto.c
@@ -32,6 +32,16 @@
  */
 
 #include "ntlm.h"
+struct hx509_certs_data;
+struct krb5_pk_identity;
+struct krb5_pk_cert;
+struct ContentInfo;
+struct AlgorithmIdentifier;
+struct _krb5_krb_auth_data;
+struct krb5_dh_moduli;
+struct _krb5_key_data;
+struct _krb5_encryption_type;
+struct _krb5_key_type;
 #include "krb5-private.h"
 
 /*