--- fastjar-0.97/jartool.c	2010-02-03 17:52:35.000000000 +0100
+++ fastjar-0.97/jartool.c-gil	2010-02-03 17:55:50.000000000 +0100
@@ -1257,7 +1257,7 @@
       exit_on_error("write");
 
   /* write the file name to the zip file */
-  if (1 == write(jfd, fname, file_name_length))
+  if (-1 == write(jfd, fname, file_name_length))
     exit_on_error("write");
 
   if(verbose){