diff --git a/apps/openmw/mwworld/cellref.cpp b/apps/openmw/mwworld/cellref.cpp
index 72ee56e6a..952d1cde9 100644
--- a/apps/openmw/mwworld/cellref.cpp
+++ b/apps/openmw/mwworld/cellref.cpp
@@ -20,6 +20,32 @@ namespace MWWorld
         mCellRef.mRefNum.unset();
     }
 
+    /*
+        Start of tes3mp addition
+
+        Get the mMpNum (unique multiplayer reference number) of a CellRef
+    */
+    int CellRef::getMpNum() const
+    {
+        return mCellRef.mMpNum;
+    }
+    /*
+        End of tes3mp addition
+    */
+
+    /*
+        Start of tes3mp addition
+
+        Set the mMpNum (unique multiplayer reference number) of a CellRef
+    */
+    void CellRef::setMpNum(int index)
+    {
+        mCellRef.mMpNum = index;
+    }
+    /*
+        End of tes3mp addition
+    */
+
     std::string CellRef::getRefId() const
     {
         return mCellRef.mRefID;
diff --git a/apps/openmw/mwworld/cellref.hpp b/apps/openmw/mwworld/cellref.hpp
index 7e27e6ef3..790b589bc 100644
--- a/apps/openmw/mwworld/cellref.hpp
+++ b/apps/openmw/mwworld/cellref.hpp
@@ -28,6 +28,26 @@ namespace MWWorld
         // Set RefNum to its default state.
         void unsetRefNum();
 
+        /*
+            Start of tes3mp addition
+
+            Get the mMpNum (unique multiplayer reference number) of a CellRef
+        */
+        int getMpNum() const;
+        /*
+            End of tes3mp addition
+        */
+
+        /*
+            Start of tes3mp addition
+
+            Set the mMpNum (unique multiplayer reference number) of a CellRef
+        */
+        void setMpNum(int index);
+        /*
+            End of tes3mp addition
+        */
+
         /// Does the RefNum have a content file?
         bool hasContentFile() const;
 
diff --git a/components/esm/cellref.cpp b/components/esm/cellref.cpp
index e41201d6e..cdf2a87ed 100644
--- a/components/esm/cellref.cpp
+++ b/components/esm/cellref.cpp
@@ -213,6 +213,16 @@ void ESM::CellRef::blank()
         mPos.pos[i] = 0;
         mPos.rot[i] = 0;
     }
+
+    /*
+        Start of tes3mp addition
+
+        Set the mMpNum (unique multiplayer reference number) to 0 by default
+    */
+    mMpNum = 0;
+    /*
+        End of tes3mp addition
+    */
 }
 
 bool ESM::operator== (const RefNum& left, const RefNum& right)
diff --git a/components/esm/cellref.hpp b/components/esm/cellref.hpp
index f14617531..a8a90357a 100644
--- a/components/esm/cellref.hpp
+++ b/components/esm/cellref.hpp
@@ -38,6 +38,16 @@ namespace ESM
             // Note: Currently unused for items in containers
             RefNum mRefNum;
 
+            /*
+                Start of tes3mp addition
+
+                Keep track of a multiplayer-only number unique to this object
+            */
+            int mMpNum;
+            /*
+                End of tes3mp addition
+            */
+
             std::string mRefID;    // ID of object being referenced
 
             float mScale;          // Scale applied to mesh