diff --git a/src/org/hwo/platform/Ressource.java b/src/org/hwo/platform/Ressource.java
index f3c62e1..79b6ab4 100644
--- a/src/org/hwo/platform/Ressource.java
+++ b/src/org/hwo/platform/Ressource.java
@@ -31,6 +31,9 @@ public class Ressource {
 	}
 
 	public static byte[] load(InputStream in) throws IOException{
+		if (in == null){
+			return new byte[0];
+		}
 		byte[] buffer = new byte[in.available()];
 		in.read(buffer);
 		return buffer;