diff --git a/client/d4.c b/client/d4.c
index 25f6548..09f3da0 100644
--- a/client/d4.c
+++ b/client/d4.c
@@ -34,7 +34,7 @@ int d4_check_config(d4_t* d4)
 
     printf("TEST snaplen %d stdin %d stdout %d\n", d4->snaplen, STDIN_FILENO, STDOUT_FILENO);
     //FIXME Check other parameters
-    if (( d4->destination.fd > 0 ) && ( d4->snaplen >0 )) {
+    if ((atoi(d4->conf[VERSION])>0) &&   ( d4->destination.fd > 0 ) && ( d4->snaplen >0 )) {
         return 1;
     }
     return -1;