diff --git a/package.json b/package.json
index 4529599..c58bac4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bookbinder",
-  "version": "1.6.0",
+  "version": "1.6.1",
   "description": "An app to rearrange PDF pages for printing for bookbinding",
   "type": "module",
   "scripts": {
diff --git a/src/utils/drawing.js b/src/utils/drawing.js
index 3cd62a1..6cd5f55 100644
--- a/src/utils/drawing.js
+++ b/src/utils/drawing.js
@@ -221,7 +221,7 @@ export function drawSpineMark(draw_top_mark, position, w) {
     [endX, endY] = position.spineMarkBottom;
   }
 
-  if (position.rotation == 0) {
+  if (position.rotation == 0 || position.rotation == 180) {
     startX -= w / 2;
     endX += w / 2;
   } else {