--- a/modules/graphics/src/main/java/javafx/scene/shape/TriangleMesh.java
+++ b/modules/graphics/src/main/java/javafx/scene/shape/TriangleMesh.java
@@ -545,7 +545,7 @@ public class TriangleMesh extends Mesh {
         if (isDirty() || cachedBounds == null) {
             cachedBounds = new BoxBounds();
             if (validate()) {
-                final double len = points.size();
+                final int len = points.size();
                 for (int i = 0; i < len; i += getVertexFormat().getPointElementSize()) {
                     cachedBounds.add(points.get(i), points.get(i + 1), points.get(i + 2));
                 }