diff --git a/include/characteristic.hpp b/include/characteristic.hpp
index 65a208d..4affc87 100644
--- a/include/characteristic.hpp
+++ b/include/characteristic.hpp
@@ -29,7 +29,7 @@ namespace character::characteristic {
         std::uint32_t materiel{ 0 };
         std::uint32_t additional{ 0 };
 
-        static std::uint32_t get_base(const characType inType) noexcept {
+        static constexpr std::uint32_t get_base(const characType inType) noexcept {
             switch (inType) {
                 case characType::Adresse:
                     return 1;
@@ -44,21 +44,21 @@ namespace character::characteristic {
     public:
         const characType type{ characType::Adresse };
 
-        Characteristic() noexcept = default;
+        constexpr Characteristic() noexcept = default;
 
-        Characteristic(const characType inType,
-                       const std::uint32_t carac,
-                       const std::uint32_t materiel,
-                       const std::uint32_t additional) :
+        constexpr Characteristic(const characType inType,
+                                 const std::uint32_t carac,
+                                 const std::uint32_t materiel,
+                                 const std::uint32_t additional) :
             base(get_base(inType)),
             carac(carac),
             materiel(materiel),
             additional(additional),
             type(inType) { (void) get_total(); }
 
-        explicit Characteristic(const characType inType) : Characteristic(inType, 0, 0, 0) {}
+        constexpr explicit Characteristic(const characType inType) : Characteristic(inType, 0, 0, 0) {}
 
-        Characteristic(const Characteristic &charac) noexcept = default;
+        constexpr Characteristic(const Characteristic &charac) noexcept = default;
 
         Characteristic &operator=(const Characteristic &charac) noexcept {
             const_cast<std::uint32_t &>(base) = charac.base;