include headers with prototypes to make sure prototypes match
diff --git a/networking/udhcp/packet.c b/networking/udhcp/packet.c
index 0f2a3bc..32b4894 100644
--- a/networking/udhcp/packet.c
+++ b/networking/udhcp/packet.c
@@ -14,6 +14,7 @@
 #endif
 #include <errno.h>
 
+#include "packet.h"
 #include "dhcpd.h"
 #include "options.h"
 #include "common.h"