diff --git a/userland/examples/pfsend.c b/userland/examples/pfsend.c
index ee269739ac..53f13faef4 100644
--- a/userland/examples/pfsend.c
+++ b/userland/examples/pfsend.c
@@ -236,6 +236,7 @@ void printHelp(void) {
   printf("-o <num>        Offset for generated IPs (-b) or packets in pcap (-f)\n");
   printf("-W <ID>[,<ID>]  Forge VLAN packets with the specified VLAN ID (and QinQ ID if specified after comma)\n");
   printf("-L <num>        Forge VLAN packets with <num> different ids\n");
+  printf("-0 <char>       Fill packet payload with the specified character (default: 0)\n");
   printf("-F              Force flush for each packet (to avoid bursts, expect low performance)\n");
   printf("-w <watermark>  TX watermark (low value=low latency) [not effective on ZC]\n");
   printf("-d              Daemon mode\n");
@@ -466,7 +467,7 @@ int main(int argc, char* argv[]) {
   srcaddr.s_addr = 0x0100000A /* 10.0.0.1 */;
   dstaddr.s_addr = 0x0100A8C0 /* 192.168.0.1 */;
 
-  while((c = getopt(argc, argv, "A:b:B:c:dD:hi:n:g:G:l:L:o:Oaf:Fr:vm:M:p:P:S:t:V:w:W:z8:")) != -1) {
+  while((c = getopt(argc, argv, "A:b:B:c:dD:hi:n:g:G:l:L:o:Oaf:Fr:vm:M:p:P:S:t:V:w:W:z8:0:")) != -1) {
     switch(c) {
     case 'A':
       uniq_pkts_per_sec = atoi(optarg);
@@ -605,6 +606,9 @@ int main(int argc, char* argv[]) {
     case '8':
       pkt_loop = atoi(optarg);
       break;
+    case '0':
+      packet_content = optarg[0];
+      break;
     default:
       printHelp();
     }
diff --git a/userland/examples/pfutils.c b/userland/examples/pfutils.c
index ac5c461b72..57ac485fa7 100644
--- a/userland/examples/pfutils.c
+++ b/userland/examples/pfutils.c
@@ -232,6 +232,7 @@ static int num_vlan = 1;
 static int forge_payload = 0;
 static char srcmac[6] = { 0 }, dstmac[6] = { 0 };
 static struct in_addr srcaddr = { 0 }, dstaddr = { 0 };
+static char packet_content = 0;
 
 static void forge_udp_packet(u_char *buffer, u_int buffer_len, u_int idx, u_int ip_version) {
   struct eth_vlan_hdr *vlan;
@@ -242,7 +243,7 @@ static void forge_udp_packet(u_char *buffer, u_int buffer_len, u_int idx, u_int
   int l2_len, ip_len, addr_len, i, payload_off;
 
   /* Reset packet */
-  memset(buffer, 0, buffer_len);
+  memset(buffer, packet_content, buffer_len);
 
   l2_len = sizeof(struct ether_header);