diff --git a/include/osmocom/abis/lapd_pcap.h b/include/osmocom/abis/lapd_pcap.h
index 1c0d555..e1b587e 100644
--- a/include/osmocom/abis/lapd_pcap.h
+++ b/include/osmocom/abis/lapd_pcap.h
@@ -5,6 +5,7 @@
 #define OSMO_LAPD_PCAP_OUTPUT	1
 
 int osmo_pcap_lapd_open(char *filename, mode_t mode);
+int osmo_pcap_lapd_set_fd(int fd);
 int osmo_pcap_lapd_write(int fd, int direction, struct msgb *msg);
 int osmo_pcap_lapd_close(int fd);