diff --git a/http.h b/http.h
index fec8ab9..a6c04f8 100644
--- a/http.h
+++ b/http.h
@@ -53,7 +53,7 @@ namespace http {
     CurlSocketData_ *socketData = nullptr;
     ResponseCallback callback;
     std::unique_ptr<HttpResponse> response;
-    HttpRequestData_(HttpClient *client) {
+    inline HttpRequestData_(HttpClient *client) {
       this->client = client;
     }
   };