diff --git a/docs/landscape.html b/docs/landscape.html
index 0a38b90e4e..abf01c9d8b 100644
--- a/docs/landscape.html
+++ b/docs/landscape.html
@@ -1593,13 +1593,14 @@
    <td valign=top nowrap>&nbsp;</td>
    <td>
     <ul>
-     <li>m1 bits 6..5 : Water class (sea, canal, river or land)
+     <li>m1 bits 6..5 : Water class (sea, canal, river or land)</li>
      <li>m1 bits 4..0: <a href="#OwnershipInfo">owner</a> of the object (for lighthouses and transmitters normally <tt>10</tt>)</li>
-     <li>m2: index into the array of objects
-     <li>m3: random bits
+     <li>m2: index into the array of objects, bits 0 to 15 (upper bits in m5)</li>
+     <li>m3: random bits</li>
+     <li>m5: index into the array of objects, bits 16 to 23 (lower bits in m2)</li>
      <li>m6 bits 7..6 : Possibility of a bridge above, in the <a href="#bridge_direction">direction specified</a></li>
      <li>m6 bits 1..0 : <a href="#tropic_zone">Tropic zone definition</a></li>
-     <li>m7: animation counter
+     <li>m7: animation counter</li>
     </ul>
    </td>
   </tr>
diff --git a/docs/landscape_grid.html b/docs/landscape_grid.html
index b7603c72d1..e2f3c1f977 100644
--- a/docs/landscape_grid.html
+++ b/docs/landscape_grid.html
@@ -332,7 +332,7 @@ the array so you can quickly see what is used and what is not.
       <td class="bits">XXXX XXXX XXXX XXXX</td>
       <td class="bits">XXXX XXXX</td>
       <td class="bits"><span class="free">OOOO OOOO</span></td>
-      <td class="bits"><span class="free">OOOO OOOO</span></td>
+      <td class="bits">XXXX XXXX</td>
       <td class="bits">XX<span class="free">OO OO</span>XX</td>
       <td class="bits">XXXX XXXX</td>
     </tr>
diff --git a/src/object_base.h b/src/object_base.h
index 676fc9c9cb..47e5a7f94c 100644
--- a/src/object_base.h
+++ b/src/object_base.h
@@ -18,7 +18,7 @@
 #include "town_type.h"
 #include "date_type.h"
 
-typedef Pool<Object, ObjectID, 64, 64000> ObjectPool;
+typedef Pool<Object, ObjectID, 64, 0xFF0000> ObjectPool;
 extern ObjectPool _object_pool;
 
 /** An object, such as transmitter, on the map. */
diff --git a/src/object_map.h b/src/object_map.h
index 3c185b14ba..85faf4444e 100644
--- a/src/object_map.h
+++ b/src/object_map.h
@@ -49,7 +49,7 @@ static inline bool IsObjectTypeTile(TileIndex t, ObjectType type)
 static inline ObjectID GetObjectIndex(TileIndex t)
 {
 	assert(IsTileType(t, MP_OBJECT));
-	return _m[t].m2;
+	return _m[t].m2 | _m[t].m5 << 16;
 }
 
 /**
@@ -81,7 +81,7 @@ static inline void MakeObject(TileIndex t, Owner o, ObjectID index, WaterClass w
 	_m[t].m2 = index;
 	_m[t].m3 = random;
 	_m[t].m4 = 0;
-	_m[t].m5 = 0;
+	_m[t].m5 = index >> 16;
 	SB(_m[t].m6, 2, 4, 0);
 	_me[t].m7 = 0;
 }
diff --git a/src/object_type.h b/src/object_type.h
index 1ebb24d534..4ead576f38 100644
--- a/src/object_type.h
+++ b/src/object_type.h
@@ -28,11 +28,11 @@ static const ObjectType NUM_OBJECTS         = 64000;  ///< Number of supported o
 static const ObjectType INVALID_OBJECT_TYPE = 0xFFFF; ///< An invalid object
 
 /** Unique identifier for an object. */
-typedef uint16 ObjectID;
+typedef uint32 ObjectID;
 
 struct Object;
 struct ObjectSpec;
 
-static const ObjectID INVALID_OBJECT = 0xFFFF; ///< An invalid object
+static const ObjectID INVALID_OBJECT = 0xFFFFFFFF; ///< An invalid object
 
 #endif /* OBJECT_TYPE_H */
diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
index 5f56b0a08e..96b568b82d 100644
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -2819,9 +2819,9 @@ bool AfterLoadGame()
 		/* Move ObjectType from map to pool */
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_OBJECT)) {
-				Object *o = Object::GetByTile(t);
+				Object *o = Object::Get(_m[t].m2);
 				o->type = _m[t].m5;
-				_m[t].m5 = 0; // cleanup for next usage
+				_m[t].m5 = 0; // zero upper bits of (now bigger) ObjectID
 			}
 		}
 	}