diff --git a/src/server/distrend.c b/src/server/distrend.c
--- a/src/server/distrend.c
+++ b/src/server/distrend.c
@@ -275,7 +275,7 @@ int prepare_distrenjob(struct distrenjob
 
   /* prepares all the frames by setting that status to "unassigned" */
   counter2 = start_frame;
-  for(counter = 0; counter <= distrenjob->total_frames; counter++){
+  for(counter = 0; counter < distrenjob->total_frames; counter++){
     distrenjob->frameset[counter].num = counter2;
     distrenjob->frameset[counter].status = FRAMESETSTATUS_UNASSIGNED;