diff --git a/rust/kernel/auxiliary.rs b/rust/kernel/auxiliary.rs
index 60dfbec8f330..2ace0428e45e 100644
--- a/rust/kernel/auxiliary.rs
+++ b/rust/kernel/auxiliary.rs
@@ -137,10 +137,18 @@ macro_rules! module_auxiliary_driver {
 
 impl DeviceId {
     /// Create a new [`DeviceId`] from name.
+    ///
+    /// This is only intended to be called in const context, when constructing a
+    /// device ID table, where exceeding `AUXILIARY_NAME_SIZE` is a compile time error.
     pub const fn new(modname: &'static CStr, name: &'static CStr) -> Self {
         let name = name.to_bytes_with_nul();
         let modname = modname.to_bytes_with_nul();
 
+        assert!(
+            modname.len().saturating_add(name.len()) <= bindings::AUXILIARY_NAME_SIZE as usize,
+            "auxiliary device ID is too long"
+        );
+
         let mut id: bindings::auxiliary_device_id = pin_init::zeroed();
         let mut i = 0;
         while i < modname.len() {