diff --git a/ztc_create.py b/ztc_create.py
index b5f2eeb..bc362c5 100755
--- a/ztc_create.py
+++ b/ztc_create.py
@@ -289,7 +289,7 @@ def z_host_create(zbx_host, zbx_vname, group_id, appl_name, lld_name, lld_key, i
     gitems = list()
     i = 0
     for graph in g2_itemids:
-        gitems.append({'itemid': graph, 'color': colors[i], 'drawtype': '5'})
+        gitems.append({'itemid': graph, 'color': colors[i], 'drawtype': '5', 'calc_fnc': '9'})
         i += 1
 
     g2_id = zapi.graph.create({'hostids': host_id, 'name': g2_name, 'width': '1000', 'height': '300',