diff --git a/sys/include/net/nanocoap.h b/sys/include/net/nanocoap.h
index 257e5ba491..a663379868 100644
--- a/sys/include/net/nanocoap.h
+++ b/sys/include/net/nanocoap.h
@@ -582,18 +582,6 @@ static inline void *coap_get_token(const coap_pkt_t *pkt)
     return coap_hdr_data_ptr(pkt->hdr);
 }
 
-/**
- * @brief   Get the total header length (4-byte header + token length)
- *
- * @param[in]   pkt   CoAP packet
- *
- * @returns     total header length
- */
-static inline unsigned coap_get_total_hdr_len(const coap_pkt_t *pkt)
-{
-    return sizeof(coap_hdr_t) + coap_get_token_len(pkt);
-}
-
 /**
  * @brief   Get the total length of a CoAP packet in the packet buffer
  *
@@ -676,6 +664,19 @@ static inline uint8_t *coap_hdr_data_ptr(const coap_hdr_t *hdr)
     return ((uint8_t *)hdr) + sizeof(coap_hdr_t) + coap_hdr_tkl_ext_len(hdr);
 }
 
+/**
+ * @brief   Get the total header length (4-byte header + token length)
+ *
+ * @param[in]   pkt   CoAP packet
+ *
+ * @returns     total header length
+ */
+static inline unsigned coap_get_total_hdr_len(const coap_pkt_t *pkt)
+{
+    return sizeof(coap_hdr_t) + coap_hdr_tkl_ext_len(pkt->hdr) +
+           coap_get_token_len(pkt);
+}
+
 /**
  * @brief   Write the given raw message code to given CoAP header
  *