diff --git a/apps/openmw/mwclass/actor.cpp b/apps/openmw/mwclass/actor.cpp
index d46729c1d..e3e924649 100644
--- a/apps/openmw/mwclass/actor.cpp
+++ b/apps/openmw/mwclass/actor.cpp
@@ -39,8 +39,8 @@ namespace MWClass
 
     void Actor::block(const MWWorld::Ptr &ptr) const
     {
-        MWWorld::InventoryStore& inv = getInventoryStore(ptr);
-        MWWorld::ContainerStoreIterator shield = inv.getSlot(MWWorld::InventoryStore::Slot_CarriedLeft);
+        const MWWorld::InventoryStore& inv = getInventoryStore(ptr);
+        MWWorld::ConstContainerStoreIterator shield = inv.getSlot(MWWorld::InventoryStore::Slot_CarriedLeft);
         if (shield == inv.end())
             return;
 
diff --git a/apps/openmw/mwclass/armor.cpp b/apps/openmw/mwclass/armor.cpp
index 75560dbcb..aeae43f73 100644
--- a/apps/openmw/mwclass/armor.cpp
+++ b/apps/openmw/mwclass/armor.cpp
@@ -295,7 +295,7 @@ namespace MWClass
 
     std::pair<int, std::string> Armor::canBeEquipped(const MWWorld::ConstPtr &ptr, const MWWorld::Ptr &npc) const
     {
-        MWWorld::InventoryStore& invStore = npc.getClass().getInventoryStore(npc);
+        const MWWorld::InventoryStore& invStore = npc.getClass().getInventoryStore(npc);
 
         if (ptr.getCellRef().getCharge() == 0)
             return std::make_pair(0, "#{sInventoryMessage1}");
@@ -332,7 +332,7 @@ namespace MWClass
             // If equipping a shield, check if there's a twohanded weapon conflicting with it
             if(*slot == MWWorld::InventoryStore::Slot_CarriedLeft)
             {
-                MWWorld::ContainerStoreIterator weapon = invStore.getSlot(MWWorld::InventoryStore::Slot_CarriedRight);
+                MWWorld::ConstContainerStoreIterator weapon = invStore.getSlot(MWWorld::InventoryStore::Slot_CarriedRight);
 
                 if(weapon == invStore.end())
                     return std::make_pair(1,"");
diff --git a/apps/openmw/mwclass/creature.cpp b/apps/openmw/mwclass/creature.cpp
index 0be61ef51..8c663474f 100644
--- a/apps/openmw/mwclass/creature.cpp
+++ b/apps/openmw/mwclass/creature.cpp
@@ -194,10 +194,10 @@ namespace MWClass
         // FIXME: use const version of InventoryStore functions once they are available
         if (ptr.getClass().hasInventoryStore(ptr))
         {
-            MWWorld::InventoryStore& invStore = ptr.getClass().getInventoryStore(ptr);
+            const MWWorld::InventoryStore& invStore = ptr.getClass().getInventoryStore(ptr);
             for (int slot = 0; slot < MWWorld::InventoryStore::Slots; ++slot)
             {
-                MWWorld::ContainerStoreIterator equipped = invStore.getSlot(slot);
+                MWWorld::ConstContainerStoreIterator equipped = invStore.getSlot(slot);
                 if (equipped != invStore.end())
                 {
                     model = equipped->getClass().getModel(*equipped);
diff --git a/apps/openmw/mwworld/inventorystore.cpp b/apps/openmw/mwworld/inventorystore.cpp
index 794832733..fd3049f7c 100644
--- a/apps/openmw/mwworld/inventorystore.cpp
+++ b/apps/openmw/mwworld/inventorystore.cpp
@@ -215,6 +215,11 @@ MWWorld::ContainerStoreIterator MWWorld::InventoryStore::getSlot (int slot)
     return mSlots[slot];
 }
 
+MWWorld::ConstContainerStoreIterator MWWorld::InventoryStore::getSlot (int slot) const
+{
+    return const_cast<InventoryStore*>(this)->getSlot (slot);
+}
+
 bool MWWorld::InventoryStore::canActorAutoEquip(const MWWorld::Ptr& actor, const MWWorld::Ptr& item)
 {
     if (!Settings::Manager::getBool("prevent merchant equipping", "Game"))
diff --git a/apps/openmw/mwworld/inventorystore.hpp b/apps/openmw/mwworld/inventorystore.hpp
index f625e4cd1..93350e7c7 100644
--- a/apps/openmw/mwworld/inventorystore.hpp
+++ b/apps/openmw/mwworld/inventorystore.hpp
@@ -155,6 +155,7 @@ namespace MWWorld
             /// \note if no item selected, return end() iterator
 
             ContainerStoreIterator getSlot (int slot);
+            ConstContainerStoreIterator getSlot(int slot) const;
 
             void unequipAll(const MWWorld::Ptr& actor);
             ///< Unequip all currently equipped items.