diff --git a/sys/net/application_layer/nanocoap/sock.c b/sys/net/application_layer/nanocoap/sock.c
index 5f343e68a3..892c977498 100644
--- a/sys/net/application_layer/nanocoap/sock.c
+++ b/sys/net/application_layer/nanocoap/sock.c
@@ -268,7 +268,7 @@ ssize_t nanocoap_sock_request_cb(nanocoap_sock_t *sock, coap_pkt_t *pkt,
                 continue;
             }
             if (res < 0) {
-                DEBUG("nanocoap: error receiving coap response, %" PRIdSIZE "\n", res);
+                DEBUG("nanocoap: error receiving CoAP response, %" PRIdSIZE "\n", res);
                 return res;
             }
 
@@ -279,7 +279,7 @@ ssize_t nanocoap_sock_request_cb(nanocoap_sock_t *sock, coap_pkt_t *pkt,
                 continue;
             }
             else if (_id_or_token_missmatch(pkt, id, token, token_len)) {
-                DEBUG("nanocoap: ID mismatch %u != %u\n", coap_get_id(pkt), id);
+                DEBUG("nanocoap: ID mismatch, got %u want %u\n", coap_get_id(pkt), id);
                 continue;
             }
 
@@ -675,11 +675,11 @@ int nanocoap_sock_get_blockwise(nanocoap_sock_t *sock, const char *path,
 
     unsigned num = 0;
     while (ctx.more) {
-        DEBUG("fetching block %u\n", num);
+        DEBUG("nanocoap: fetching block %u\n", num);
 
         int res = _fetch_block(sock, buf, sizeof(buf), path, blksize, num, &ctx);
         if (res < 0) {
-            DEBUG("error fetching block %u: %d\n", num, res);
+            DEBUG("nanocoap: error fetching block %u: %d\n", num, res);
             return res;
         }
 
@@ -817,16 +817,16 @@ int nanocoap_server(sock_udp_ep_t *local, uint8_t *buf, size_t bufsize)
         res = sock_udp_recv_aux(&sock.udp, buf, bufsize, SOCK_NO_TIMEOUT,
                                 &remote, aux_in_ptr);
         if (res <= 0) {
-            DEBUG("error receiving UDP packet %" PRIdSIZE "\n", res);
+            DEBUG("nanocoap: error receiving UDP packet %" PRIdSIZE "\n", res);
             continue;
         }
         coap_pkt_t pkt;
         if (coap_parse(&pkt, (uint8_t *)buf, res) < 0) {
-            DEBUG("error parsing packet\n");
+            DEBUG("nanocoap: error parsing packet\n");
             continue;
         }
         if ((res = coap_handle_req(&pkt, buf, bufsize, &ctx)) <= 0) {
-            DEBUG("error handling request %" PRIdSIZE "\n", res);
+            DEBUG("nanocoap: error handling request %" PRIdSIZE "\n", res);
             continue;
         }