diff --git a/lib/gssapi/gssapi_locl.h b/lib/gssapi/gssapi_locl.h
index 1a7bcce69..54c6176f3 100644
--- a/lib/gssapi/gssapi_locl.h
+++ b/lib/gssapi/gssapi_locl.h
@@ -241,6 +241,10 @@ _gss_DES3_get_mic_compat(OM_uint32 *, gss_ctx_id_t);
 OM_uint32
 _gss_spnego_require_mechlist_mic(OM_uint32 *, gss_ctx_id_t, krb5_boolean *);
 
+krb5_error_code
+_gss_check_compat(OM_uint32 *, gss_name_t, const char *,
+		  krb5_boolean *, krb5_boolean);
+
 OM_uint32
 gssapi_lifetime_left(OM_uint32 *, OM_uint32, OM_uint32 *);
 
diff --git a/lib/gssapi/krb5/gssapi_locl.h b/lib/gssapi/krb5/gssapi_locl.h
index 1a7bcce69..54c6176f3 100644
--- a/lib/gssapi/krb5/gssapi_locl.h
+++ b/lib/gssapi/krb5/gssapi_locl.h
@@ -241,6 +241,10 @@ _gss_DES3_get_mic_compat(OM_uint32 *, gss_ctx_id_t);
 OM_uint32
 _gss_spnego_require_mechlist_mic(OM_uint32 *, gss_ctx_id_t, krb5_boolean *);
 
+krb5_error_code
+_gss_check_compat(OM_uint32 *, gss_name_t, const char *,
+		  krb5_boolean *, krb5_boolean);
+
 OM_uint32
 gssapi_lifetime_left(OM_uint32 *, OM_uint32, OM_uint32 *);