diff --git a/core/net/packetbuf.c b/core/net/packetbuf.c
index 1e6b9a57f..a2f295816 100644
--- a/core/net/packetbuf.c
+++ b/core/net/packetbuf.c
@@ -47,6 +47,7 @@
 #include "contiki-net.h"
 #include "net/packetbuf.h"
 #include "net/rime/rime.h"
+#include "sys/cc.h"
 
 struct packetbuf_attr packetbuf_attrs[PACKETBUF_NUM_ATTRS];
 struct packetbuf_addr packetbuf_addrs[PACKETBUF_NUM_ADDRS];
@@ -89,7 +90,7 @@ packetbuf_copyfrom(const void *from, uint16_t len)
   uint16_t l;
 
   packetbuf_clear();
-  l = len > PACKETBUF_SIZE? PACKETBUF_SIZE: len;
+  l = MIN(PACKETBUF_SIZE, len);
   memcpy(packetbufptr, from, l);
   buflen = l;
   return l;