diff --git a/abw1ga2etc.js b/abw1ga2etc.js
index 6bcd868..9f63a8d 100644
--- a/abw1ga2etc.js
+++ b/abw1ga2etc.js
@@ -14,7 +14,10 @@ if (!this.initialized) {
 var currentRotation = this.cylinder.rotation.x;
 
 var offset = currentRotation / 0.4488;
-var remainder = currentRotation % 0.4488;
+
+var integer = Math.floor(offset);
+
+var remainder = offset - integer;
 
 console.log('offset:' + offset + ', remainder: ' + remainder);