diff --git a/eos/saveddata/module.py b/eos/saveddata/module.py
index c4c2f0b00..4ff5113f2 100644
--- a/eos/saveddata/module.py
+++ b/eos/saveddata/module.py
@@ -965,6 +965,10 @@ class Module(HandledItem, HandledCharge, ItemAttrShortcut, ChargeAttrShortcut):
         else:
             return currState
 
+    @property
+    def isMutated(self):
+        return bool(self.mutators)
+
     def __deepcopy__(self, memo):
         item = self.item
         if item is None:
diff --git a/service/port/eft.py b/service/port/eft.py
index 91d0b8d47..d7e4174ef 100644
--- a/service/port/eft.py
+++ b/service/port/eft.py
@@ -80,13 +80,12 @@ def exportEft(fit, options):
         modules = modsBySlotType.get(slotType, ())
         for module in modules:
             if module.item:
-                mutated = bool(module.mutators)
                 # if module was mutated, use base item name for export
-                if mutated:
+                if module.isMutated:
                     modName = module.baseItem.name
                 else:
                     modName = module.item.name
-                if mutated and options & Options.MUTATIONS.value:
+                if module.isMutated and options & Options.MUTATIONS.value:
                     mutants[mutantReference] = module
                     mutationSuffix = ' [{}]'.format(mutantReference)
                     mutantReference += 1
diff --git a/service/port/multibuy.py b/service/port/multibuy.py
index 6a3c4425e..550721e18 100644
--- a/service/port/multibuy.py
+++ b/service/port/multibuy.py
@@ -45,6 +45,9 @@ def exportMultiBuy(fit, options):
     exportCharges = svcFit.getInstance().serviceFittingOptions["exportCharges"]
     for module in fit.modules:
         if module.item:
+            # Mutated items are of no use for multibuy
+            if module.isMutated:
+                continue
             addItem(module.item)
         if exportCharges and module.charge:
             addItem(module.charge, module.numCharges)