diff --git a/net_gen/Cargo.toml b/net_gen/Cargo.toml
index 4e28dcb79..33572e3ba 100644
--- a/net_gen/Cargo.toml
+++ b/net_gen/Cargo.toml
@@ -2,6 +2,7 @@
 name = "net_gen"
 version = "0.1.0"
 authors = ["The Chromium OS Authors"]
+edition = "2018"
 
 [dependencies]
 vmm-sys-util = ">=0.3.1"
diff --git a/net_util/Cargo.toml b/net_util/Cargo.toml
index 3b10c4bba..2448b2832 100644
--- a/net_util/Cargo.toml
+++ b/net_util/Cargo.toml
@@ -2,6 +2,7 @@
 name = "net_util"
 version = "0.1.0"
 authors = ["The Chromium OS Authors"]
+edition = "2018"
 
 [dependencies]
 epoll = ">=4.0.1"
diff --git a/net_util/src/tap.rs b/net_util/src/tap.rs
index be34cdc32..a03fdff3c 100644
--- a/net_util/src/tap.rs
+++ b/net_util/src/tap.rs
@@ -6,8 +6,7 @@
 // found in the THIRD-PARTY file.
 
 use super::{create_sockaddr, create_socket, vnet_hdr_len, Error as NetUtilError, MacAddr};
-use mac::MAC_ADDR_LEN;
-use net_gen;
+use crate::mac::MAC_ADDR_LEN;
 use std::fs::File;
 use std::io::{Error as IoError, Read, Result as IoResult, Write};
 use std::net;