diff --git a/src/onion/response.c b/src/onion/response.c
index 104c370f..b8a6a61d 100644
--- a/src/onion/response.c
+++ b/src/onion/response.c
@@ -574,6 +574,8 @@ const char *onion_response_code_description(int code) {
     return "Method Not Allowed";
   case HTTP_RANGE_NOT_SATISFIABLE:
     return "Range Not Satisfiable";
+  case HTTP_IM_A_TEAPOT:
+    return "I'm a teapot";
 
   case HTTP_INTERNAL_ERROR:
     return "Internal Server Error";
diff --git a/src/onion/response.h b/src/onion/response.h
index fee29f1e..1dfec457 100644
--- a/src/onion/response.h
+++ b/src/onion/response.h
@@ -63,6 +63,7 @@ extern "C" {
     HTTP_NOT_FOUND = 404,
     HTTP_METHOD_NOT_ALLOWED = 405,
     HTTP_RANGE_NOT_SATISFIABLE = 416,
+    HTTP_IM_A_TEAPOT = 418,
 
     // Error codes
     HTTP_INTERNAL_ERROR = 500,