diff --git a/daemon/gvfsbackendsmbbrowse.c b/daemon/gvfsbackendsmbbrowse.c
index 028118b..35888d1 100644
--- a/daemon/gvfsbackendsmbbrowse.c
+++ b/daemon/gvfsbackendsmbbrowse.c
@@ -802,6 +802,7 @@ do_mount (GVfsBackend *backend,
       return;
     }
 
+  lp_set_cmdline ("client max protocol", "NT1");
   smbc_setOptionUserData (smb_context, backend);
 
   debug = g_getenv ("GVFS_SMB_DEBUG");
diff --git a/daemon/gvfsbackendsmbprivate.h b/daemon/gvfsbackendsmbprivate.h
index 07d970d..4d8a868 100644
--- a/daemon/gvfsbackendsmbprivate.h
+++ b/daemon/gvfsbackendsmbprivate.h
@@ -25,4 +25,7 @@
 
 char *create_smb_uri (const char *server, int port, const char *share, const char *path);
 
+/* from samba's proto.h */
+int lp_set_cmdline(const char *pszParmName, const char *pszParmValue);
+
 #endif /* __G_VFS_BACKEND_SMB_PRIVATE_H__ */