diff --git a/src/ConstString.cpp b/src/ConstString.cpp
deleted file mode 100644
index 1880fe0..0000000
--- a/src/ConstString.cpp
+++ /dev/null
@@ -1 +0,0 @@
-#include "ConstString.hpp"
diff --git a/src/ConstString.hpp b/src/ConstString.hpp
index b2ea282..68c415b 100644
--- a/src/ConstString.hpp
+++ b/src/ConstString.hpp
@@ -20,14 +20,14 @@ namespace Arbutils {
     public:
         constexpr explicit ConstString(const char* str) : _str(str), _length(Length(str)), _hash(Hash(str)){};
 
-        [[nodiscard]] constexpr const char* c_str() const noexcept { return _str; }
-        [[nodiscard]] std::string std_str() const { return std::string(_str, _length); }
+        [[nodiscard]] inline constexpr const char* c_str() const noexcept { return _str; }
+        [[nodiscard]] inline std::string std_str() const { return std::string(_str, _length); }
 
-        [[nodiscard]] constexpr size_t Length() const noexcept { return _length; }
+        [[nodiscard]] inline constexpr size_t Length() const noexcept { return _length; }
 
-        [[nodiscard]] constexpr uint32_t GetHash() const noexcept { return _hash; }
+        [[nodiscard]] inline constexpr uint32_t GetHash() const noexcept { return _hash; }
     };
-    constexpr ConstString operator"" _const(const char* c) { return ConstString(c); }
+    inline constexpr ConstString operator"" _const(const char* c) { return ConstString(c); }
 }
 
 #endif // ARBUTILS_CONSTSTRING_HPP