diff --git a/eos/saveddata/fit.py b/eos/saveddata/fit.py
index 5a277070c..35c332b36 100644
--- a/eos/saveddata/fit.py
+++ b/eos/saveddata/fit.py
@@ -549,7 +549,7 @@ class Fit(object):
 
     @property
     def calibrationUsed(self):
-        return self.getItemAttrSum(self.modules, 'upgradeCost')
+        return self.getItemAttrOnlineSum(self.modules, 'upgradeCost')
 
     @property
     def pgUsed(self):