diff --git a/sys/i4b/driver/i4b_ipr.c b/sys/i4b/driver/i4b_ipr.c
index 5a612587ef4f..4fc5435dbc2e 100644
--- a/sys/i4b/driver/i4b_ipr.c
+++ b/sys/i4b/driver/i4b_ipr.c
@@ -105,6 +105,8 @@ __FBSDID("$FreeBSD$");
 
 #include <i4b/layer4/i4b_l4.h>
 
+NET_NEEDS_GIANT("i4b_ipr");
+
 #define I4BIPRMTU	1500		/* regular MTU */
 #define I4BIPRMAXMTU	2000		/* max MTU */
 #define I4BIPRMINMTU	500		/* min MTU */
diff --git a/sys/i4b/driver/i4b_isppp.c b/sys/i4b/driver/i4b_isppp.c
index 3f7f56c34f10..f80d1ea73a4f 100644
--- a/sys/i4b/driver/i4b_isppp.c
+++ b/sys/i4b/driver/i4b_isppp.c
@@ -67,6 +67,8 @@ __FBSDID("$FreeBSD$");
 
 #include <i4b/layer4/i4b_l4.h>
 
+NET_NEEDS_GIANT("i4b_isppp");
+
 #define ISPPP_FMT	"isp%d: "
 #define	ISPPP_ARG(sc)	((sc)->sc_if.if_dunit)
 #define	PDEVSTATIC	static