diff --git a/apps/er-coap/er-coap-engine.c b/apps/er-coap/er-coap-engine.c
index 4871368b4..2f58eda94 100644
--- a/apps/er-coap/er-coap-engine.c
+++ b/apps/er-coap/er-coap-engine.c
@@ -104,7 +104,7 @@ coap_receive(void)
               coap_new_transaction(message->mid, &UIP_IP_BUF->srcipaddr,
                                    UIP_UDP_BUF->srcport))) {
           uint32_t block_num = 0;
-          uint16_t block_size = REST_MAX_CHUNK_SIZE;
+          uint16_t block_size = COAP_MAX_BLOCK_SIZE;
           uint32_t block_offset = 0;
           int32_t new_offset = 0;
 
@@ -125,8 +125,8 @@ coap_receive(void)
           if(coap_get_header_block2
                (message, &block_num, NULL, &block_size, &block_offset)) {
             PRINTF("Blockwise: block request %lu (%u/%u) @ %lu bytes\n",
-                   block_num, block_size, REST_MAX_CHUNK_SIZE, block_offset);
-            block_size = MIN(block_size, REST_MAX_CHUNK_SIZE);
+                   block_num, block_size, COAP_MAX_BLOCK_SIZE, block_offset);
+            block_size = MIN(block_size, COAP_MAX_BLOCK_SIZE);
             new_offset = block_offset;
           }