diff --git a/uefi-raw/CHANGELOG.md b/uefi-raw/CHANGELOG.md
index 062ed6f5..622e525d 100644
--- a/uefi-raw/CHANGELOG.md
+++ b/uefi-raw/CHANGELOG.md
@@ -5,6 +5,8 @@
 ## Changed
 - **Breaking**: `MemoryDescriptor` now has a new member to ensure correct
   layout on all non-UEFI 32-bit targets.
+- **Breaking**: Corrected the `volatile` parameter of
+  `ShellProtocol::get_alias` from `Boolean` to `*mut Boolean`.
 - **Breaking**: The USB descriptor types in `protocol::usb` are now packed to
   match their layout in the USB specification. `ConfigDescriptor` and
   `EndpointDescriptor` previously had a too-large `size_of`.
diff --git a/uefi-raw/src/protocol/shell.rs b/uefi-raw/src/protocol/shell.rs
index 74f6815b..3e1b6776 100644
--- a/uefi-raw/src/protocol/shell.rs
+++ b/uefi-raw/src/protocol/shell.rs
@@ -61,7 +61,7 @@ pub struct ShellProtocol {
         volatile: Boolean,
     ) -> Status,
     pub get_alias:
-        unsafe extern "efiapi" fn(alias: *const Char16, volatile: Boolean) -> *const Char16,
+        unsafe extern "efiapi" fn(alias: *const Char16, volatile: *mut Boolean) -> *const Char16,
     pub set_alias: unsafe extern "efiapi" fn(
         command: *const Char16,
         alias: *const Char16,