diff --git a/docs/generators/c.md b/docs/generators/c.md
index 29df6b2096e2..448cf98b4bfa 100644
--- a/docs/generators/c.md
+++ b/docs/generators/c.md
@@ -56,41 +56,109 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 <li>_noreturn</li>
 <li>_static_assert</li>
 <li>_thread_local</li>
+<li>alignas</li>
+<li>alignof</li>
+<li>and</li>
+<li>and_eq</li>
+<li>asm</li>
+<li>atomic_cancel</li>
+<li>atomic_commit</li>
+<li>atomic_noexcept</li>
 <li>auto</li>
+<li>bitand</li>
+<li>bitor</li>
+<li>bool</li>
 <li>break</li>
 <li>case</li>
+<li>catch</li>
 <li>char</li>
+<li>char16_t</li>
+<li>char32_t</li>
+<li>char8_t</li>
+<li>class</li>
+<li>co_await</li>
+<li>co_return</li>
+<li>co_yield</li>
+<li>compl</li>
+<li>concept</li>
 <li>const</li>
+<li>const_cast</li>
+<li>consteval</li>
+<li>constexpr</li>
+<li>constinit</li>
 <li>continue</li>
+<li>decltype</li>
 <li>default</li>
+<li>delete</li>
 <li>do</li>
 <li>double</li>
+<li>dynamic_cast</li>
 <li>else</li>
 <li>enum</li>
+<li>explicit</li>
+<li>export</li>
 <li>extern</li>
+<li>false</li>
+<li>final</li>
 <li>float</li>
 <li>for</li>
+<li>friend</li>
 <li>goto</li>
 <li>if</li>
 <li>inline</li>
 <li>int</li>
 <li>long</li>
+<li>mutable</li>
+<li>namespace</li>
+<li>new</li>
+<li>noexcept</li>
+<li>not</li>
+<li>not_eq</li>
+<li>nullptr</li>
+<li>operator</li>
+<li>or</li>
+<li>or_eq</li>
+<li>override</li>
+<li>private</li>
+<li>protected</li>
+<li>public</li>
+<li>reflexpr</li>
 <li>register</li>
+<li>reinterpret_cast</li>
 <li>remove</li>
+<li>requires</li>
 <li>restrict</li>
 <li>return</li>
 <li>short</li>
 <li>signed</li>
 <li>sizeof</li>
 <li>static</li>
+<li>static_assert</li>
+<li>static_cast</li>
 <li>struct</li>
 <li>switch</li>
+<li>synchronized</li>
+<li>template</li>
+<li>this</li>
+<li>thread_local</li>
+<li>throw</li>
+<li>transaction_safe</li>
+<li>transaction_safe_dynamic</li>
+<li>true</li>
+<li>try</li>
 <li>typedef</li>
+<li>typeid</li>
+<li>typename</li>
 <li>union</li>
 <li>unsigned</li>
+<li>using</li>
+<li>virtual</li>
 <li>void</li>
 <li>volatile</li>
+<li>wchar_t</li>
 <li>while</li>
+<li>xor</li>
+<li>xor_eq</li>
 </ul>
 
 ## FEATURE SET
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java
index f64d2d99d3fa..dbc59ae281cc 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java
@@ -143,7 +143,111 @@ public CLibcurlClientCodegen() {
                         "_Imaginary",
                         "_Noreturn",
                         "_Static_assert",
-                        "_Thread_local")
+                        "_Thread_local",
+
+                        // cpp reserved keywords
+                        // ref: https://en.cppreference.com/w/cpp/keyword
+                        "alignas",
+                        "alignof",
+                        "and",
+                        "and_eq",
+                        "asm",
+                        "atomic_cancel",
+                        "atomic_commit",
+                        "atomic_noexcept",
+                        //"auto",
+                        "bitand",
+                        "bitor",
+                        "bool",
+                        //"break",
+                        //"case",
+                        "catch",
+                        //"char",
+                        "char8_t",
+                        "char16_t",
+                        "char32_t",
+                        "class",
+                        "compl",
+                        "concept",
+                        //"const",
+                        "consteval",
+                        "constexpr",
+                        "constinit",
+                        "const_cast",
+                        //"continue",
+                        "co_await",
+                        "co_return",
+                        "co_yield",
+                        "decltype",
+                        //"default",
+                        "delete",
+                        //"do",
+                        //"double",
+                        "dynamic_cast",
+                        //"else",
+                        //"enum",
+                        "explicit",
+                        "export",
+                        //"extern",
+                        "false",
+                        //"float",
+                        //"for",
+                        "friend",
+                        //"goto",
+                        //"if",
+                        //"inline",
+                        //"int",
+                        //"long",
+                        "mutable",
+                        "namespace",
+                        "new",
+                        "noexcept",
+                        "not",
+                        "not_eq",
+                        "nullptr",
+                        "operator",
+                        "or",
+                        "or_eq",
+                        "private",
+                        "protected",
+                        "public",
+                        "reflexpr",
+                        //"register",
+                        "reinterpret_cast",
+                        "requires",
+                        //"return",
+                        //"short",
+                        //"signed",
+                        //"sizeof",
+                        //"static",
+                        "static_assert",
+                        "static_cast",
+                        //"struct",
+                        //"switch",
+                        "synchronized",
+                        "template",
+                        "this",
+                        "thread_local",
+                        "throw",
+                        "true",
+                        "try",
+                        //"typedef",
+                        "typeid",
+                        "typename",
+                        //"union",
+                        //"unsigned",
+                        "using",
+                        "virtual",
+                        //"void",
+                        //"volatile",
+                        "wchar_t",
+                        //"while",
+                        "xor",
+                        "xor_eq",
+                        "final",
+                        "override",
+                        "transaction_safe",
+                        "transaction_safe_dynamic")
         );
 
         instantiationTypes.clear();