diff --git a/macros/src/check.rs b/macros/src/check.rs
index b0ad6f8715..312b84d5f0 100644
--- a/macros/src/check.rs
+++ b/macros/src/check.rs
@@ -1,18 +1,12 @@
 use std::collections::HashSet;
 
-use proc_macro2::Span;
-use rtic_syntax::{analyze::Analysis, ast::App};
-use syn::{parse, Path};
+use crate::syntax::ast::App;
+use syn::parse;
 
-pub struct Extra {
-    pub device: Path,
-    pub peripherals: bool,
-}
-
-pub fn app(app: &App, _analysis: &Analysis) -> parse::Result<Extra> {
+pub fn app(app: &App) -> parse::Result<()> {
     // Check that external (device-specific) interrupts are not named after known (Cortex-M)
     // exceptions
-    for name in app.args.extern_interrupts.keys() {
+    for name in app.args.dispatchers.keys() {
         let name_s = name.to_string();
 
         match &*name_s {
@@ -41,7 +35,7 @@ pub fn app(app: &App, _analysis: &Analysis) -> parse::Result<Extra> {
         .collect::<HashSet<_>>();
 
     let need = priorities.len();
-    let given = app.args.extern_interrupts.len();
+    let given = app.args.dispatchers.len();
     if need > given {
         let s = {
             format!(
@@ -72,15 +66,5 @@ pub fn app(app: &App, _analysis: &Analysis) -> parse::Result<Extra> {
         }
     }
 
-    if let Some(device) = app.args.device.clone() {
-        Ok(Extra {
-            device,
-            peripherals: app.args.peripherals,
-        })
-    } else {
-        Err(parse::Error::new(
-            Span::call_site(),
-            "a `device` argument must be specified in `#[rtic::app]`",
-        ))
-    }
+    Ok(())
 }
diff --git a/macros/src/lib.rs b/macros/src/lib.rs
index 7729dcbed0..1bda8d2f78 100644
--- a/macros/src/lib.rs
+++ b/macros/src/lib.rs
@@ -10,6 +10,7 @@ use std::{env, fs, path::Path};
 
 mod analyze;
 mod bindings;
+mod check;
 mod codegen;
 mod syntax;
 
@@ -61,6 +62,11 @@ pub fn app(args: TokenStream, input: TokenStream) -> TokenStream {
         Ok(x) => x,
     };
 
+    match check::app(&app) {
+        Err(e) => return e.to_compile_error().into(),
+        _ => {}
+    }
+
     let analysis = analyze::app(analysis, &app);
 
     let ts = codegen::app(&app, &analysis);
diff --git a/ui/extern-interrupt-not-enough.stderr b/ui/extern-interrupt-not-enough.stderr
index d8c01b9a1a..6f28b7ad00 100644
--- a/ui/extern-interrupt-not-enough.stderr
+++ b/ui/extern-interrupt-not-enough.stderr
@@ -1,4 +1,4 @@
-error: not enough interrupts to dispatch all software and async tasks (need: 1; given: 0) - one interrupt is needed per priority and sync/async task
+error: not enough interrupts to dispatch all software tasks (need: 1; given: 0)
   --> ui/extern-interrupt-not-enough.rs:17:8
    |
 17 |     fn a(_: a::Context) {}