diff --git a/rust/kernel/module_param.rs b/rust/kernel/module_param.rs
index 6a8a7a875643..dd6d663a0a3c 100644
--- a/rust/kernel/module_param.rs
+++ b/rust/kernel/module_param.rs
@@ -62,8 +62,7 @@ pub trait ModuleParam: Sized + Copy {
     // NOTE: If we start supporting arguments without values, val _is_ allowed
     // to be null here.
     if val.is_null() {
-        // TODO: Use pr_warn_once available.
-        crate::pr_warn!("Null pointer passed to `module_param::set_param`");
+        crate::pr_warn_once!("Null pointer passed to `module_param::set_param`");
         return EINVAL.to_errno();
     }