diff --git a/core/src/net/sf/openrocket/appearance/defaults/ResourceDecalImage.java b/core/src/net/sf/openrocket/appearance/defaults/ResourceDecalImage.java
index 6b41636d0..bea3b8d76 100644
--- a/core/src/net/sf/openrocket/appearance/defaults/ResourceDecalImage.java
+++ b/core/src/net/sf/openrocket/appearance/defaults/ResourceDecalImage.java
@@ -7,7 +7,6 @@ import java.io.InputStream;
 import java.util.EventListener;
 
 import net.sf.openrocket.appearance.DecalImage;
-import net.sf.openrocket.document.Attachment;
 
 
 class ResourceDecalImage implements DecalImage {
@@ -38,11 +37,6 @@ class ResourceDecalImage implements DecalImage {
 		
 	}
 	
-	@Override
-	public int compareTo(Attachment a) {
-		return this.hashCode() - a.hashCode();
-	}
-	
 	@Override
 	public void addChangeListener(EventListener listener) {
 		//Unimplemented, this can not change