diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c
index cd7a9a651ef..f79282e06a8 100644
--- a/sys/dev/fxp/if_fxp.c
+++ b/sys/dev/fxp/if_fxp.c
@@ -44,7 +44,9 @@ __FBSDID("$FreeBSD$");
 #include <sys/endian.h>
 #include <sys/kernel.h>
 #include <sys/mbuf.h>
+#include <sys/lock.h>
 #include <sys/module.h>
+#include <sys/mutex.h>
 #include <sys/rman.h>
 #include <sys/socket.h>
 #include <sys/sockio.h>