diff --git a/library/include/modules/Constructions.h b/library/include/modules/Constructions.h
index 9e2150dd6..cc9fef2b1 100644
--- a/library/include/modules/Constructions.h
+++ b/library/include/modules/Constructions.h
@@ -46,7 +46,7 @@ namespace Constructions
 struct t_construction {
     df::coord pos;
     df::item_type item_type;
-    int16_t unk;
+    int16_t item_subtype;
     int16_t mat_type;
     int32_t mat_index;
     df::construction_flags flags;
diff --git a/library/include/modules/kitchen.h b/library/include/modules/kitchen.h
index a18011390..fab387288 100644
--- a/library/include/modules/kitchen.h
+++ b/library/include/modules/kitchen.h
@@ -49,7 +49,7 @@ typedef uint8_t t_exclusionType;
 const unsigned int seedLimit = 400; // a limit on the limits which can be placed on seeds
 const t_itemSubtype organicSubtype = -1; // seems to fixed
 const t_exclusionType cookingExclusion = 1; // seems to be fixed
-const t_itemType limitType = 0; // used to store limit as an entry in the exclusion list. 0 = BAR
+const df::enums::item_type::item_type limitType = df::enums::item_type::BAR; // used to store limit as an entry in the exclusion list. 0 = BAR
 const t_itemSubtype limitSubtype = 0; // used to store limit as an entry in the exclusion list
 const t_exclusionType limitExclusion = 4; // used to store limit as an entry in the exclusion list
 
diff --git a/library/modules/Constructions.cpp b/library/modules/Constructions.cpp
index 0f371b56a..ac9057075 100644
--- a/library/modules/Constructions.cpp
+++ b/library/modules/Constructions.cpp
@@ -67,7 +67,7 @@ bool Constructions::copyConstruction(const int32_t index, t_construction &out)
 
     out.pos = out.origin->pos;
     out.item_type = out.origin->item_type;
-    out.unk = out.origin->anon_1;
+    out.item_subtype = out.origin->item_subtype;
     out.mat_type = out.origin->mat_type;
     out.mat_index = out.origin->mat_index;
     out.flags = out.origin->flags;