diff --git a/include/CLI/App.hpp b/include/CLI/App.hpp
index a98352c5..1cca625c 100644
--- a/include/CLI/App.hpp
+++ b/include/CLI/App.hpp
@@ -810,8 +810,8 @@ class App {
         std::stringstream out;
         for(const Option_p &opt : options_) {
 
-            // Only process option with a long-name
-            if(!opt->lnames_.empty()) {
+            // Only process option with a long-name and configurable
+            if(!opt->lnames_.empty() && opt->get_configurable()) {
                 std::string name = prefix + opt->lnames_[0];
 
                 // Non-flags
diff --git a/tests/IniTest.cpp b/tests/IniTest.cpp
index 695b3c26..1e032cc7 100644
--- a/tests/IniTest.cpp
+++ b/tests/IniTest.cpp
@@ -561,6 +561,20 @@ TEST_F(TApp, IniOutputSimple) {
     EXPECT_EQ("simple=3\n", str);
 }
 
+TEST_F(TApp, IniOutputNoConfigurable) {
+
+    int v1, v2;
+    app.add_option("--simple", v1);
+    app.add_option("--noconf", v2)->configurable(false);
+
+    args = {"--simple=3", "--noconf=2"};
+
+    run();
+
+    std::string str = app.config_to_str();
+    EXPECT_EQ("simple=3\n", str);
+}
+
 TEST_F(TApp, IniOutputVector) {
 
     std::vector<int> v;