diff --git a/tools/dungeonjson/dungeonjson.cpp b/tools/dungeonjson/dungeonjson.cpp
index e61952632..3b7acc929 100644
--- a/tools/dungeonjson/dungeonjson.cpp
+++ b/tools/dungeonjson/dungeonjson.cpp
@@ -519,7 +519,6 @@ string generate_dungeon_item_encodings_text(Json map_data) {
     int item_probability;
     bool first;
     int last_index;
-    string last_index_name;
 
     text << "@ This is auto-generated by dungeon_item_data.json.\n";