diff --git a/packages/mermaid/src/rendering-util/rendering-elements/shapes/subroutine.ts b/packages/mermaid/src/rendering-util/rendering-elements/shapes/subroutine.ts
index 432c209a4e..c4393c25fa 100644
--- a/packages/mermaid/src/rendering-util/rendering-elements/shapes/subroutine.ts
+++ b/packages/mermaid/src/rendering-util/rendering-elements/shapes/subroutine.ts
@@ -43,8 +43,7 @@ export const subroutine = async (parent: SVGAElement, node: Node) => {
   const h = bbox.height + node.padding;
   const x = -bbox.width / 2 - halfPadding;
   const y = -bbox.height / 2 - halfPadding;
-  let rect;
-  const { cssStyles } = node;
+
   const points = [
     { x: 0, y: 0 },
     { x: w, y: 0 },
@@ -69,9 +68,10 @@ export const subroutine = async (parent: SVGAElement, node: Node) => {
 
     shapeSvg.insert(() => l1, ':first-child');
     shapeSvg.insert(() => l2, ':first-child');
-    rect = shapeSvg.insert(() => roughNode, ':first-child');
-
+    const rect = shapeSvg.insert(() => roughNode, ':first-child');
+    const { cssStyles } = node;
     rect.attr('class', 'basic label-container').attr('style', cssStyles);
+    updateNodeBounds(node, rect);
   } else {
     const el = insertPolygonShape(shapeSvg, w, h, points);
     if (nodeStyles) {