diff --git a/src/full_node/cost_calculator.py b/src/full_node/cost_calculator.py
index 3452f393cbbe..dbf9827cc0f0 100644
--- a/src/full_node/cost_calculator.py
+++ b/src/full_node/cost_calculator.py
@@ -27,7 +27,7 @@ def calculate_cost_of_program(
     total_vbyte_cost = 0
     for npc in npc_list:
         for condition, cvp_list in npc.condition_dict.items():
-            if condition is ConditionOpcode.AGG_SIG:
+            if condition is ConditionOpcode.AGG_SIG or condition is ConditionOpcode.AGG_SIG_ME:
                 total_vbyte_cost += len(cvp_list) * ConditionCost.AGG_SIG.value
             elif condition is ConditionOpcode.CREATE_COIN:
                 total_vbyte_cost += len(cvp_list) * ConditionCost.CREATE_COIN.value