diff --git a/vdc.c b/vdc.c
index 1eb674c..7dad143 100644
--- a/vdc.c
+++ b/vdc.c
@@ -55,7 +55,7 @@
 }
 
 static int do_cmd(int sock, int argc, char **argv) {
-    char final_cmd[255] = { '\0' };
+    char final_cmd[255] = "0 "; /* 0 is a (now required) sequence number */
     int i;
     int ret;