diff --git a/apps/openmw/mwgui/companionwindow.cpp b/apps/openmw/mwgui/companionwindow.cpp
index 4ea2a44c70..9c54664b49 100644
--- a/apps/openmw/mwgui/companionwindow.cpp
+++ b/apps/openmw/mwgui/companionwindow.cpp
@@ -51,7 +51,7 @@ void CompanionWindow::onItemSelected(int index)
     const ItemStack& item = mSortModel->getItem(index);
 
     // We can't take conjured items from a companion NPC
-    if (item.mBase.getCellRef().getRefId().size() > 6 && item.mBase.getCellRef().getRefId().substr(0,6) == "bound_")
+    if (item.mFlags & ItemStack::Flag_Bound)
     {
         MWBase::Environment::get().getWindowManager()->messageBox("#{sBarterDialog12}");
         return;
diff --git a/apps/openmw/mwgui/container.cpp b/apps/openmw/mwgui/container.cpp
index bc04eafebd..18488b9b3d 100644
--- a/apps/openmw/mwgui/container.cpp
+++ b/apps/openmw/mwgui/container.cpp
@@ -114,7 +114,7 @@ namespace MWGui
         MWBase::Environment::get().getSoundManager()->playSound (sound, 1.0, 1.0);
 
         // We can't drop a conjured item to the ground; the target container should always be the source container
-        if (mItem.mBase.getCellRef().getRefId().size() > 6 && mItem.mBase.getCellRef().getRefId().substr(0,6) == "bound_" && targetModel != mSourceModel)
+        if (mItem.mFlags & ItemStack::Flag_Bound && targetModel != mSourceModel)
         {
             MWBase::Environment::get().getWindowManager()->messageBox("#{sBarterDialog12}");
             return;
@@ -184,7 +184,7 @@ namespace MWGui
         const ItemStack& item = mSortModel->getItem(index);
 
         // We can't take a conjured item from a container (some NPC we're pickpocketing, a box, etc)
-        if (item.mBase.getCellRef().getRefId().size() > 6 && item.mBase.getCellRef().getRefId().substr(0,6) == "bound_")
+        if (item.mFlags & ItemStack::Flag_Bound)
         {
             MWBase::Environment::get().getWindowManager()->messageBox("#{sContentsMessage1}");
             return;
diff --git a/apps/openmw/mwgui/inventorywindow.cpp b/apps/openmw/mwgui/inventorywindow.cpp
index 2ec30d5bd3..89fbb85b05 100644
--- a/apps/openmw/mwgui/inventorywindow.cpp
+++ b/apps/openmw/mwgui/inventorywindow.cpp
@@ -189,8 +189,8 @@ namespace MWGui
 
         if (mTrading)
         {
-            // Can't give cojured items to a merchant
-            if (item.mBase.getCellRef().getRefId().size() > 6 && item.mBase.getCellRef().getRefId().substr(0,6) == "bound_")
+            // Can't give conjured items to a merchant
+            if (item.mFlags & ItemStack::Flag_Bound)
             {
                 MWBase::Environment::get().getSoundManager()->playSound (sound, 1.0, 1.0);
                 MWBase::Environment::get().getWindowManager()->messageBox("#{sBarterDialog9}");