diff --git a/uefi-raw/CHANGELOG.md b/uefi-raw/CHANGELOG.md
index c9014782c..15a8d793f 100644
--- a/uefi-raw/CHANGELOG.md
+++ b/uefi-raw/CHANGELOG.md
@@ -1,5 +1,7 @@
 # uefi-raw - [Unreleased]
 
+## Changed
+- `maximum_capsule_size` of `query_capsule_capabilities` now takes a *mut u64 instead of a *mut usize.
 
 # uefi-raw - 0.5.2 (2024-04-19)
 
diff --git a/uefi-raw/src/table/runtime.rs b/uefi-raw/src/table/runtime.rs
index e6474e71d..088118272 100644
--- a/uefi-raw/src/table/runtime.rs
+++ b/uefi-raw/src/table/runtime.rs
@@ -66,7 +66,7 @@ pub struct RuntimeServices {
     pub query_capsule_capabilities: unsafe extern "efiapi" fn(
         capsule_header_array: *const *const CapsuleHeader,
         capsule_count: usize,
-        maximum_capsule_size: *mut usize,
+        maximum_capsule_size: *mut u64,
         reset_type: *mut ResetType,
     ) -> Status,