diff --git a/examples/rpl_udp/helper.c b/examples/rpl_udp/helper.c
index 6a22910117..e1b3e92ccc 100644
--- a/examples/rpl_udp/helper.c
+++ b/examples/rpl_udp/helper.c
@@ -70,7 +70,7 @@ void rpl_udp_monitor(void)
         }
         else if (m.type == IPV6_PACKET_RECEIVED) {
             ipv6_buf = (ipv6_hdr_t*) m.content.ptr;
-            printf("IPv& datagram received (next header: %02X)", ipv6_buf->nextheader); 
+            printf("IPv6 datagram received (next header: %02X)", ipv6_buf->nextheader);
             printf(" from %s ", ipv6_addr_to_str(addr_str, &ipv6_buf->srcaddr));
             if (ipv6_buf->nextheader == IPV6_PROTO_NUM_ICMPV6) {
                 icmpv6_buf = (icmpv6_hdr_t*) &ipv6_buf[(LL_HDR_LEN + IPV6_HDR_LEN) + ipv6_ext_hdr_len];
diff --git a/examples/rpl_udp/rpl.c b/examples/rpl_udp/rpl.c
index fd85bdbf93..e96208c99a 100644
--- a/examples/rpl_udp/rpl.c
+++ b/examples/rpl_udp/rpl.c
@@ -171,7 +171,7 @@ void rpl_udp_dodag(char *unused)
 
     if (mydodag == NULL) {
         printf("Not part of a dodag\n");
-        printf("---------------------------$\n");
+        printf("---------------------------\n");
         return;
     }
 
@@ -182,5 +182,5 @@ void rpl_udp_dodag(char *unused)
         printf("my preferred parent:\n");
         printf("%s\n", ipv6_addr_to_str(addr_str, (&mydodag->my_preferred_parent->addr)));
     }
-    printf("---------------------------$\n");
+    printf("---------------------------\n");
 }
diff --git a/examples/rpl_udp/udp.c b/examples/rpl_udp/udp.c
index c6f9bb4bfb..bcbc83f322 100644
--- a/examples/rpl_udp/udp.c
+++ b/examples/rpl_udp/udp.c
@@ -25,7 +25,7 @@ void udp_server(char *unused)
 {
     (void) unused;
     int udp_server_thread_pid = thread_create(udp_server_stack_buffer, KERNEL_CONF_STACKSIZE_MAIN, PRIORITY_MAIN, CREATE_STACKTEST, init_udp_server, "init_udp_server");
-    printf("UDP SERVER THREAD PID: %i\n", udp_server_thread_pid);
+    printf("UDP SERVER ON PORT %d (THREAD PID: %d)\n", HTONS(SERVER_PORT), udp_server_thread_pid);
 }
 
 void init_udp_server(void)
diff --git a/sys/net/transport_layer/destiny/destiny.c b/sys/net/transport_layer/destiny/destiny.c
index 3f434c8f29..906219b66c 100644
--- a/sys/net/transport_layer/destiny/destiny.c
+++ b/sys/net/transport_layer/destiny/destiny.c
@@ -36,7 +36,7 @@ char tcp_timer_stack[TCP_TIMER_STACKSIZE];
 
 int destiny_init_transport_layer(void)
 {
-    printf("Initializing transport layer packages. Size of socket_type: %u\n",
+    printf("Initializing transport layer packages. Size of socket_type: %zu\n",
            sizeof(socket_internal_t));
     /* SOCKETS */
     memset(sockets, 0, MAX_SOCKETS * sizeof(socket_internal_t));