diff --git a/package/nginx-naxsi/Config.in b/package/nginx-naxsi/Config.in
index 6c175eb75e..5ae5497060 100644
--- a/package/nginx-naxsi/Config.in
+++ b/package/nginx-naxsi/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_NGINX_NAXSI
 	bool "nginx-naxsi"
+	# uses pcre, so nginx needs to be built with pcre support
 	select BR2_PACKAGE_PCRE
 	help
 	  NAXSI means Nginx Anti XSS & SQL Injection.