diff --git a/src/Library/CreatureData/CreatureSpecies.cpp b/src/Library/CreatureData/CreatureSpecies.cpp
index 16b3fb5..04f2ef5 100644
--- a/src/Library/CreatureData/CreatureSpecies.cpp
+++ b/src/Library/CreatureData/CreatureSpecies.cpp
@@ -13,7 +13,7 @@ bool CreatureSpecies::HasVariant(const std::string& name) const {
     return _variants.find(key) != _variants.end();
 }
 
-bool CreatureSpecies::TryGetVariant(const std::string& name, const SpeciesVariant*& out) {
+bool CreatureSpecies::TryGetVariant(const std::string& name, const SpeciesVariant*& out) const {
     auto key = name;
     std::transform(key.begin(), key.end(), key.end(), ::tolower);
     auto find = _variants.find(key);
diff --git a/src/Library/CreatureData/CreatureSpecies.hpp b/src/Library/CreatureData/CreatureSpecies.hpp
index 2c62beb..23455ea 100644
--- a/src/Library/CreatureData/CreatureSpecies.hpp
+++ b/src/Library/CreatureData/CreatureSpecies.hpp
@@ -37,7 +37,7 @@ namespace CreatureLib::Library {
         inline uint8_t GetCaptureRate() const { return _captureRate; }
 
         [[nodiscard]] bool HasVariant(const std::string& key) const;
-        [[nodiscard]] bool TryGetVariant(const std::string& name, const SpeciesVariant*& out);
+        [[nodiscard]] bool TryGetVariant(const std::string& name, const SpeciesVariant*& out) const;
         [[nodiscard]] const SpeciesVariant* GetVariant(const std::string& key) const;
         [[nodiscard]] Gender GetRandomGender(Core::Random& rand) const;
         [[nodiscard]] const std::string& GetName() const;