diff --git a/src/ether.c b/src/ether.c
index dfe44b5..967e08d 100644
--- a/src/ether.c
+++ b/src/ether.c
@@ -365,6 +365,7 @@ LispPTR ether_reset(LispPTR args[])
 /*	it's OK to read packets from the network on interrupt.		*/
 /*									*/
 /************************************************************************/
+LispPTR get_packet();
 
 LispPTR ether_get(LispPTR args[])
 {