diff --git a/convert.py b/convert.py
index cc40411..dc08fbd 100644
--- a/convert.py
+++ b/convert.py
@@ -62,6 +62,8 @@ def convert_type_ids(path):
         if groupIDs[entry["groupID"]]["categoryID"] == 6:
             ships.append(id)
 
+        if "factionID" in entry:
+            pb2.entries[id].factionID = entry["factionID"]
         if "marketGroupID" in entry:
             pb2.entries[id].marketGroupID = entry["marketGroupID"]
         if "capacity" in entry:
diff --git a/esf.proto b/esf.proto
index edf6f76..650dc42 100644
--- a/esf.proto
+++ b/esf.proto
@@ -28,11 +28,12 @@ message TypeIDs {
         required int32 categoryID = 3;
         required bool published = 4;
 
-        optional int32 marketGroupID = 5;
-        optional float capacity = 6;
-        optional float mass = 7;
-        optional float radius = 8;
-        optional float volume = 9;
+        optional int32 factionID = 5;
+        optional int32 marketGroupID = 6;
+        optional float capacity = 7;
+        optional float mass = 8;
+        optional float radius = 9;
+        optional float volume = 10;
     }
 
     map<int32, TypeID> entries = 1;