diff --git a/rust/kernel/io.rs b/rust/kernel/io.rs
index ee182b0b5452..6465ea94e85d 100644
--- a/rust/kernel/io.rs
+++ b/rust/kernel/io.rs
@@ -13,6 +13,12 @@ pub mod resource;
 
 pub use resource::Resource;
 
+/// Resource Size type.
+///
+/// This is a type alias to either `u32` or `u64` depending on the config option
+/// `CONFIG_PHYS_ADDR_T_64BIT`, and it can be a u64 even on 32-bit architectures.
+pub type ResourceSize = bindings::resource_size_t;
+
 /// Raw representation of an MMIO region.
 ///
 /// By itself, the existence of an instance of this structure does not provide any guarantees that
diff --git a/rust/kernel/io/resource.rs b/rust/kernel/io/resource.rs
index 11b6bb9678b4..7fed41fc2030 100644
--- a/rust/kernel/io/resource.rs
+++ b/rust/kernel/io/resource.rs
@@ -12,11 +12,7 @@ use crate::prelude::*;
 use crate::str::{CStr, CString};
 use crate::types::Opaque;
 
-/// Resource Size type.
-///
-/// This is a type alias to either `u32` or `u64` depending on the config option
-/// `CONFIG_PHYS_ADDR_T_64BIT`, and it can be a u64 even on 32-bit architectures.
-pub type ResourceSize = bindings::resource_size_t;
+pub use super::ResourceSize;
 
 /// A region allocated from a parent [`Resource`].
 ///