diff --git a/src/StaticGameData.cc b/src/StaticGameData.cc
index 07ae1a05..3b7d3451 100644
--- a/src/StaticGameData.cc
+++ b/src/StaticGameData.cc
@@ -1710,7 +1710,7 @@ string name_for_item(const ItemData& item, bool include_color_codes) {
       name_info = name_info_for_primary_identifier.at(primary_identifier);
       ret_tokens.emplace_back(name_info.name);
     } catch (const out_of_range&) {
-      ret_tokens.emplace_back("!ID:%06" PRIX32, primary_identifier);
+      ret_tokens.emplace_back(string_printf("!ID:%06" PRIX32, primary_identifier));
     }
   }