diff --git a/convert.py b/convert.py
index b05cb72..909763e 100644
--- a/convert.py
+++ b/convert.py
@@ -113,6 +113,8 @@ def convert_market_groups(path):
 
         if "parentGroupID" in entry:
             pb2.entries[id].parentGroupID = entry["parentGroupID"]
+        if "iconID" in entry:
+            pb2.entries[id].iconID = entry["iconID"]
 
     with open("dist/sde/marketGroups.pb2", "wb") as fp:
         fp.write(pb2.SerializeToString())
diff --git a/esf.proto b/esf.proto
index 388b3c2..dafc536 100644
--- a/esf.proto
+++ b/esf.proto
@@ -55,6 +55,7 @@ message MarketGroups {
         required string name = 1;
 
         optional int32 parentGroupID = 2;
+        optional int32 iconID = 3;
     }
 
     map<int32, MarketGroup> entries = 1;