diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
index de784ad..91e8ccc 100644
--- a/networking/udhcp/common.h
+++ b/networking/udhcp/common.h
@@ -88,7 +88,7 @@
 void udhcp_sp_setup(void) FAST_FUNC;
 int udhcp_sp_fd_set(fd_set *rfds, int extra_fd) FAST_FUNC;
 int udhcp_sp_read(const fd_set *rfds) FAST_FUNC;
-int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *arp) FAST_FUNC;
+int udhcp_read_interface(const char *interface, int *ifindex, uint32_t *nip, uint8_t *mac) FAST_FUNC;
 int udhcp_raw_socket(int ifindex) FAST_FUNC;
 int udhcp_listen_socket(/*uint32_t ip,*/ int port, const char *inf) FAST_FUNC;
 /* Returns 1 if no reply received */