diff --git a/data/Memory-ng.xml b/data/Memory-ng.xml
index 0b9148a13..a82955748 100644
--- a/data/Memory-ng.xml
+++ b/data/Memory-ng.xml
@@ -665,6 +665,9 @@
             <class name="building_actualst"/>
             <class name="buildingst"/>
             <class name="building_slabst" />
+            <class name="building_nestst" />
+            <class name="building_nest_boxst" />
+            <class name="building_hivest" />
         </VTable>
         <Offsets>
             <Address name="WORLD" description="A huge object that many things in DF are part of. Contains the whole game and can be used as a base
@@ -1947,15 +1950,24 @@
             <Group name="Vegetation" valid="true">
                 <Address name="vector" value="0x16db478" />
             </Group>
+            <Group name="Constructions" valid="true">
+                <Address name="vector" value="0x16c6ae8" />
+            </Group>
+            <Group name="Buildings" valid="true">
+                <Address name="buildings_vector" value="0x16dad78" valid="true" />
+                One of those really. Which one is the right one?
+                0x16dad78
+                0x16dad88
+                <Address name="custom_workshop_vector" value="0x1724204" valid="true" />
+                Let's assume those didn't change...
+                <!--
+                <Offset name="building_custom_workshop_type" value="0x11c" /> INVALID?
+                <Offset name="custom_workshop_name" value="0x4" /> INVALID?
+                <Offset name="custom_workshop_type" value="0x20" /> INVALID?
+                -->
+            </Group>
             <!--
             <Address name="WORLD" valid="false" />
-            <Group name="Buildings">
-                <Address name="buildings_vector" value="0x16a1be0" />
-                <Address name="custom_workshop_vector" value="0x16eaca0" />
-                <Offset name="building_custom_workshop_type" value="0x11c" /> INVALID!
-                <Offset name="custom_workshop_name" value="0x4" /> INVALID!
-                <Offset name="custom_workshop_type" value="0x20" /> INVALID!
-            </Group>
             <Group name="Maps">
                 <Group name="features">
                     <Group name="global">
@@ -1973,9 +1985,6 @@
             <Group name="Creatures" valid="false" >
                 0x016a12c0 vector
             </Group>
-            <Group name="Constructions">
-                <Address name="vector" value="0x168d930"/>
-            </Group>
             <Group name="Translations">
                 <Address name="language_vector" value="0x016e553c"/>
                 <Address name="translation_vector" value="0x016e551c"/>