diff --git a/plugins/in_nginx_exporter_metrics/nginx.h b/plugins/in_nginx_exporter_metrics/nginx.h
index a1889456e68..19b3de8239f 100644
--- a/plugins/in_nginx_exporter_metrics/nginx.h
+++ b/plugins/in_nginx_exporter_metrics/nginx.h
@@ -45,7 +45,7 @@ struct nginx_ctx
     struct cmt_gauge *connections_waiting;
     struct cmt_gauge *connection_up;
     bool is_up;
-    bool is_nginx_plus;
+    int is_nginx_plus;
     int nginx_plus_version;
 
     struct nginx_plus_connections *plus_connections;