diff --git a/examples/server/server.cpp b/examples/server/server.cpp
index d0d0c0b79..8f0b702d5 100644
--- a/examples/server/server.cpp
+++ b/examples/server/server.cpp
@@ -888,7 +888,7 @@ int main(int argc, char **argv)
       }
   });
 
-  svr.Options(R"(/.*)", [&llama](const Request &req, Response &res)
+  svr.Options(R"(/.*)", [&llama](const Request &, Response &res)
             {
                 return res.set_content("", "application/json");
             });