diff --git a/cost_function.py b/cost_function.py
index d33725ee504b1eb5cd74510b9d335d185d67d5c8..2f49a9efab585dff6cbdce9195aea83e738fd5bb 100755
--- a/cost_function.py
+++ b/cost_function.py
@@ -30,12 +30,12 @@ import util_eddies
 import bisect
 import argparse
 
-def calculate_radii_rossby(segment, e_overestim, handlers, array_d_init):
+def calculate_radii_rossby(list_eddies, e_overestim, handlers, array_d_init):
     radii = 0 # in m
     rossby = 0
     days_modifier = 0
 
-    for n in segment:
+    for n in list_eddies:
         current_eddy = report_graph.node_to_date_eddy(n, e_overestim)
         i_SHPC = get_SHPC(array_d_init, current_eddy['date_index'])