diff --git a/include/CLI/App.hpp b/include/CLI/App.hpp
index 22b3370f..5de6ac72 100644
--- a/include/CLI/App.hpp
+++ b/include/CLI/App.hpp
@@ -538,7 +538,7 @@ class App {
         };
 
         Option *opt = add_option(name, fun, description, false);
-        opt->set_type_name(
+        opt->set_type_name_fn(
             [&options]() { return std::string(detail::type_name<T>()) + " in {" + detail::join(options) + "}"; });
 
         return opt;
@@ -589,7 +589,7 @@ class App {
         };
 
         Option *opt = add_option(name, fun, description, defaulted);
-        opt->set_type_name(
+        opt->set_type_name_fn(
             [&options]() { return std::string(detail::type_name<T>()) + " in {" + detail::join(options) + "}"; });
         if(defaulted) {
             std::stringstream out;
@@ -648,7 +648,7 @@ class App {
         };
 
         Option *opt = add_option(name, fun, description, false);
-        opt->set_type_name([&options]() {
+        opt->set_type_name_fn([&options]() {
             return std::string(detail::type_name<std::string>()) + " in {" + detail::join(options) + "}";
         });
 
@@ -708,7 +708,7 @@ class App {
         };
 
         Option *opt = add_option(name, fun, description, defaulted);
-        opt->set_type_name([&options]() {
+        opt->set_type_name_fn([&options]() {
             return std::string(detail::type_name<std::string>()) + " in {" + detail::join(options) + "}";
         });
         if(defaulted) {
diff --git a/include/CLI/Option.hpp b/include/CLI/Option.hpp
index f56749fb..352a230c 100644
--- a/include/CLI/Option.hpp
+++ b/include/CLI/Option.hpp
@@ -631,11 +631,11 @@ class Option : public OptionBase<Option> {
 
     /// Set the type name displayed on this option
     void set_type_name(std::string typeval) {
-        typeval_ = [typeval]() { return typeval; };
+        set_type_name_fn([typeval]() { return typeval; });
     }
 
     /// Set the type function to run when displayed on this option
-    void set_type_name(std::function<std::string()> typefun) { typeval_ = typefun; }
+    void set_type_name_fn(std::function<std::string()> typefun) { typeval_ = typefun; }
 
     /// Get the typename for this option
     std::string get_type_name() const { return typeval_(); }