diff --git a/promhttp/src/promhttp.c b/promhttp/src/promhttp.c
index d94a53e..857baa0 100644
--- a/promhttp/src/promhttp.c
+++ b/promhttp/src/promhttp.c
@@ -29,8 +29,13 @@ void promhttp_set_active_collector_registry(prom_collector_registry_t *active_re
   }
 }
 
+#if MHD_VERSION >= 0x00097002
+enum MHD_Result promhttp_handler(void *cls, struct MHD_Connection *connection, const char *url, const char *method,
+                     const char *version, const char *upload_data, size_t *upload_data_size, void **con_cls) {
+#else
 int promhttp_handler(void *cls, struct MHD_Connection *connection, const char *url, const char *method,
                      const char *version, const char *upload_data, size_t *upload_data_size, void **con_cls) {
+#endif
   if (strcmp(method, "GET") != 0) {
     char *buf = "Invalid HTTP Method\n";
     struct MHD_Response *response = MHD_create_response_from_buffer(strlen(buf), (void *)buf, MHD_RESPMEM_PERSISTENT);