diff --git a/BuildSpecies.cpp b/BuildSpecies.cpp
index 1f0e815..9a22f72 100644
--- a/BuildSpecies.cpp
+++ b/BuildSpecies.cpp
@@ -135,7 +135,7 @@ const PkmnLib::Library::PokemonForme* BuildSpecies::BuildForme(const std::string
         auto s = ab.value().get<std::string>();
         auto tryAbility = talentLibrary->TryGet(ArbUt::StringView(s.c_str(), s.length()));
         if (!tryAbility.has_value())
-            THROW("Unknown ability " << s);
+            THROW("Unknown ability ", s);
         abilities.Append(tryAbility.value());
     }
 
@@ -144,7 +144,7 @@ const PkmnLib::Library::PokemonForme* BuildSpecies::BuildForme(const std::string
         auto s = ab.value().get<std::string>();
         auto tryAbility = talentLibrary->TryGet(ArbUt::StringView(s.c_str(), s.length()));
         if (!tryAbility.has_value())
-            THROW("Unknown ability " << s);
+            THROW("Unknown ability ", s);
         hiddenAbilities.Append(tryAbility.value());
     }