diff --git a/render.php b/render.php
index 9ec14aa..d29b0a8 100644
--- a/render.php
+++ b/render.php
@@ -77,6 +77,7 @@ function render_with_config_path($config_file) {
 			if ($types[$i] == "SECTION") {
 				$tag = "h2";
 				$section_no++;
+				$subsection_no = 0;
 				$number = "$page_no.$section_no.";
 			}
 			if ($types[$i] == "SUBSECTION") {