diff --git a/python/inet/scave/plot.py b/python/inet/scave/plot.py
index 68c0db0b8ef..403f0caac4a 100644
--- a/python/inet/scave/plot.py
+++ b/python/inet/scave/plot.py
@@ -736,7 +736,7 @@ def remove_zero_index_if_present(df):
                     pattern = re.compile(i[0])
                     match = re.fullmatch(pattern, df[order_column][j])
                     if match != None:
-                        df['order'][j] = i[1]
+                        df.loc[j, 'order'] = i[1]
         else:
             order_column = order[0]
             order_list = order[1:]
@@ -747,7 +747,7 @@ def remove_zero_index_if_present(df):
                     pattern = re.compile(order_list[order])
                     match = re.fullmatch(pattern, df[order_column][j])
                     if match != None:
-                        df['order'][j] = order
+                        df.loc[j, 'order'] = order
 
                     
         # if debug: