diff --git a/.azure/install-rust.yml b/.azure/install-rust.yml
index 28b291d8c..9e66d4e33 100644
--- a/.azure/install-rust.yml
+++ b/.azure/install-rust.yml
@@ -44,6 +44,7 @@ steps:
       rustup update --no-self-update $RUST_TOOLCHAIN
       rustup default $RUST_TOOLCHAIN
       rustup target add x86_64-unknown-linux-musl
+      rustup target add wasm32-wasi
 
       if [ -n "$ANDROID" ]; then
         rustup target add x86_64-linux-android --toolchain $RUST_TOOLCHAIN
diff --git a/Makefile b/Makefile
index a357cdf50..360439c71 100644
--- a/Makefile
+++ b/Makefile
@@ -211,7 +211,7 @@ check-bench: check-bench-singlepass check-bench-llvm
 # to https://github.com/rust-lang/cargo/issues/6745 .
 NOT_RUNTIME_CRATES = -p wasmer-clif-backend -p wasmer-singlepass-backend -p wasmer-middleware-common -p wasmer-runtime-core -p wasmer-emscripten -p wasmer-llvm-backend -p wasmer-wasi -p wasmer-kernel-loader -p wasmer-interface-types
 RUNTIME_CHECK = cargo check --manifest-path lib/runtime/Cargo.toml --no-default-features
-check: check-bench
+check: check-bench check-kernel-net
 	cargo check $(NOT_RUNTIME_CRATES)
 	cargo check --release $(NOT_RUNTIME_CRATES)
 	cargo check --all-features $(NOT_RUNTIME_CRATES)
@@ -263,6 +263,8 @@ check: check-bench
 		--features=llvm,default-backend-llvm
 		--features=default-backend-singlepass,singlepass,cranelift,llvm,cache,deterministic-execution
 
+check-kernel-net: cargo +nightly check -p kernel-net --target=wasm32-wasi
+
 # Release
 release:
 	cargo build --release --features backend-singlepass,backend-cranelift,backend-llvm,loader-kernel,experimental-io-devices,log/release_max_level_off
diff --git a/lib/kernel-net/src/lib.rs b/lib/kernel-net/src/lib.rs
index cc6f91820..bfedbd5a9 100644
--- a/lib/kernel-net/src/lib.rs
+++ b/lib/kernel-net/src/lib.rs
@@ -59,13 +59,13 @@ thread_local! {
 
 #[derive(Default)]
 struct AsyncState {
-    callback: Option<Box<FnOnce()>>,
+    callback: Option<Box<dyn FnOnce()>>,
     _epoll: Option<Arc<Epoll>>,
 }
 
 pub struct Epoll {
     fd: i32,
-    imm_queue: Mutex<Vec<Box<FnOnce()>>>,
+    imm_queue: Mutex<Vec<Box<dyn FnOnce()>>>,
 }
 
 impl Epoll {
@@ -163,7 +163,7 @@ fn get_async_io_payload<
     direction: EpollDirection,
     poll_action: P,
     on_ready: F,
-) -> Box<FnOnce()> {
+) -> Box<dyn FnOnce()> {
     __get_async_io_payload(epoll, fd, direction, poll_action, on_ready, false)
 }
 
@@ -178,7 +178,7 @@ fn __get_async_io_payload<
     mut poll_action: P,
     on_ready: F,
     registered: bool,
-) -> Box<FnOnce()> {
+) -> Box<dyn FnOnce()> {
     let epfd = epoll.fd;
     Box::new(move || {
         //println!("async io payload");
@@ -230,7 +230,7 @@ struct SockaddrIn {
 }
 
 #[repr(C)]
-#[derive(Copy, Clone)]
+#[derive(Default, Copy, Clone)]
 struct InAddr {
     s_addr: u32,
 }