diff --git a/sys/netgraph/ng_source.c b/sys/netgraph/ng_source.c
index ea341b6ce7c1..a82982db943f 100644
--- a/sys/netgraph/ng_source.c
+++ b/sys/netgraph/ng_source.c
@@ -125,8 +125,13 @@ static int		ng_source_dup_mod(sc_p, struct mbuf *,
 
 /* Parse type for timeval */
 static const struct ng_parse_struct_field ng_source_timeval_type_fields[] = {
+#ifdef __LP64__
+	{ "tv_sec",		&ng_parse_int64_type	},
+	{ "tv_usec",		&ng_parse_int64_type	},
+#else
 	{ "tv_sec",		&ng_parse_int32_type	},
 	{ "tv_usec",		&ng_parse_int32_type	},
+#endif
 	{ NULL }
 };
 const struct ng_parse_type ng_source_timeval_type = {