diff --git a/core/net/packetbuf.h b/core/net/packetbuf.h
index cca365f6e..0afd02a74 100644
--- a/core/net/packetbuf.h
+++ b/core/net/packetbuf.h
@@ -370,11 +370,6 @@ enum {
 extern struct packetbuf_attr packetbuf_attrs[];
 extern struct packetbuf_addr packetbuf_addrs[];
 
-static int               packetbuf_set_attr(uint8_t type, const packetbuf_attr_t val);
-static packetbuf_attr_t    packetbuf_attr(uint8_t type);
-static int               packetbuf_set_addr(uint8_t type, const linkaddr_t *addr);
-static const linkaddr_t *packetbuf_addr(uint8_t type);
-
 static inline int
 packetbuf_set_attr(uint8_t type, const packetbuf_attr_t val)
 {