diff --git a/script/sim/utils.py b/script/sim/utils.py
index 8a04831..6bfc102 100644
--- a/script/sim/utils.py
+++ b/script/sim/utils.py
@@ -44,7 +44,7 @@ def integrate_ips(ips, as_float=True):
     return aux
 
 def average_ips (ips, roi=None, as_float=True):   
-    aux = integrate(ips, as_float)     
+    aux = integrate_ips(ips, as_float)     
     op_const(aux, "divide", float(len(ips)), in_place=True)    
     return aux