diff --git a/src/ConstString.hpp b/src/ConstString.hpp
index 10d2cae..12121a3 100644
--- a/src/ConstString.hpp
+++ b/src/ConstString.hpp
@@ -20,17 +20,13 @@ namespace Arbutils {
 
         ~__ConstStringCharHolder() { delete[] _value; }
 
-        inline void RemoveReference(){
-            if (--_references == 0){
+        inline void RemoveReference() {
+            if (--_references == 0) {
                 delete this;
             }
         }
-        inline void AddReference(){
-            _references++;
-        }
-        inline const char* GetValue(){
-            return _value;
-        }
+        inline void AddReference() { _references++; }
+        inline constexpr const char* GetValue() const { return _value; }
     };
 }