diff --git a/core/src/net/sf/openrocket/rocketcomponent/MassObject.java b/core/src/net/sf/openrocket/rocketcomponent/MassObject.java
index 1522fde04..13ab4b8c7 100644
--- a/core/src/net/sf/openrocket/rocketcomponent/MassObject.java
+++ b/core/src/net/sf/openrocket/rocketcomponent/MassObject.java
@@ -248,8 +248,8 @@ public abstract class MassObject extends InternalComponent {
 	@Override
 	public final Collection<Coordinate> getComponentBounds() {
 		Collection<Coordinate> c = new ArrayList<Coordinate>();
-		addBound(c, 0, radius);
-		addBound(c, length, radius);
+		addBound(c, 0, getRadius());
+		addBound(c, getLength(), getRadius());
 		return c;
 	}