diff --git a/CHANGELOG.md b/CHANGELOG.md
index 106f2d4e..99c33d41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,7 +17,7 @@ Changes to the help system (most normal users will not notice this):
 * Protected function `_has_help_positional` removed
 * `format_help` can now be chained
 
-Validators are now much more powerful [#118], all build in validators upgraded to the new form:
+Validators are now much more powerful [#118], all built in validators upgraded to the new form:
 
 * A subclass of `CLI::Validator` is now also accepted.
 * They now can set the type name to things like `PATH` and `INT in [1-4]`.
diff --git a/include/CLI/Option.hpp b/include/CLI/Option.hpp
index 352a230c..5bc1bd84 100644
--- a/include/CLI/Option.hpp
+++ b/include/CLI/Option.hpp
@@ -171,7 +171,9 @@ class Option : public OptionBase<Option> {
     std::string defaultval_;
 
     /// A human readable type value, set when App creates this
-    std::function<std::string()> typeval_;
+    ///
+    /// This is a lambda function so "types" can be dynamic, such as when a set prints its contents.
+    std::function<std::string()> type_name_;
 
     /// True if this option has a default
     bool default_{false};
@@ -635,10 +637,10 @@ class Option : public OptionBase<Option> {
     }
 
     /// Set the type function to run when displayed on this option
-    void set_type_name_fn(std::function<std::string()> typefun) { typeval_ = typefun; }
+    void set_type_name_fn(std::function<std::string()> typefun) { type_name_ = typefun; }
 
     /// Get the typename for this option
-    std::string get_type_name() const { return typeval_(); }
+    std::string get_type_name() const { return type_name_(); }
 };
 
 } // namespace CLI