diff --git a/luna/include/luna/Option.h b/luna/include/luna/Option.h
index ce5a57dd..70266c0f 100644
--- a/luna/include/luna/Option.h
+++ b/luna/include/luna/Option.h
@@ -101,7 +101,7 @@ template <typename T> class Option
         return true;
     }
 
-    bool try_move_value(T& ref) const
+    bool try_move_value(T& ref)
     {
         if (!has_value()) return false;
         m_has_value = false;
diff --git a/luna/include/luna/Result.h b/luna/include/luna/Result.h
index 8fd56785..9f833b8e 100644
--- a/luna/include/luna/Result.h
+++ b/luna/include/luna/Result.h
@@ -110,7 +110,7 @@ template <typename T> class Result
         return m_value.try_set_value(ref);
     }
 
-    bool try_move_value(T& ref) const
+    bool try_move_value(T& ref)
     {
         return m_value.try_move_value(ref);
     }