diff --git a/uk/ac/sanger/artemis/util/ZipFileDocument.java b/uk/ac/sanger/artemis/util/ZipFileDocument.java
index 459dc602f92648cb2cee60ea1a0e37a6098d08c8..8f1bd20840c14c6f7c3660fdca57d54a85fab20c 100644
--- a/uk/ac/sanger/artemis/util/ZipFileDocument.java
+++ b/uk/ac/sanger/artemis/util/ZipFileDocument.java
@@ -140,7 +140,7 @@ public class ZipFileDocument extends FileDocument
   public boolean readable() 
   {
     if(getFile().exists() && 
-       getFile ().canWrite() && 
+       getFile ().canRead() && 
        zipFile.getName().endsWith(".zip")) 
     {
       if(containsEntry())