diff --git a/objc2-foundation-sys/src/generated_nsstring.rs b/objc2-foundation-sys/src/generated_nsstring.rs
index 2df6e5654..c6eaa6255 100644
--- a/objc2-foundation-sys/src/generated_nsstring.rs
+++ b/objc2-foundation-sys/src/generated_nsstring.rs
@@ -10,7 +10,7 @@ use objc2::rc::{Id, Unknown};
 use objc2::runtime::{Bool, Object};
 use objc2::{class, msg_send, Encoding, Message, RefEncode};
 
-use crate::{Autoreleased, NSArray, NSObject};
+use crate::{Autoreleased, NSArray, NSData, NSObject};
 
 pub type NSRange = [NSUInteger; 2];
 pub type NSComparisonResult = NSInteger;
@@ -18,7 +18,6 @@ pub type NSComparisonResult = NSInteger;
 pub type NSCoder = NSObject;
 pub type NSLocale = NSObject;
 pub type NSError = NSObject;
-pub type NSData = NSObject;
 pub type NSDictionary = NSObject;
 pub type NSCharacterSet = NSObject;
 pub type NSURL = NSObject;
diff --git a/objc2-foundation-sys/src/generated_others_shim.rs b/objc2-foundation-sys/src/generated_others_shim.rs
index bcb42adec..94a843015 100644
--- a/objc2-foundation-sys/src/generated_others_shim.rs
+++ b/objc2-foundation-sys/src/generated_others_shim.rs
@@ -3,6 +3,8 @@
 use core::mem::ManuallyDrop;
 use core::ptr::NonNull;
 
+use std::os::raw::c_void;
+
 use objc2::ffi::{NSInteger, NSUInteger};
 use objc2::rc::{Id, Unknown};
 use objc2::runtime::Object;
@@ -55,8 +57,12 @@ impl NSArray {
         let this = ManuallyDrop::new(this);
         Id::new(msg_send![this, initWithObjects: objects, count: cnt])
     }
-    pub unsafe fn initWithCoder_(&self, coder: NonNull<NSCoder>) -> Option<Id<Self, Unknown>> {
-        Id::new_null(msg_send![self, initWithCoder: coder])
+    pub unsafe fn initWithCoder_(
+        this: Id<Self, Unknown>,
+        coder: NonNull<NSCoder>,
+    ) -> Option<Id<Self, Unknown>> {
+        let this = ManuallyDrop::new(this);
+        Id::new_null(msg_send![this, initWithCoder: coder])
     }
     pub unsafe fn count(&self) -> NSUInteger {
         msg_send![self, count]
@@ -71,3 +77,60 @@ impl NSArray {
         msg_send![self, getObjects: objects, range: range]
     }
 }
+
+#[repr(transparent)]
+pub struct NSData(NSObject);
+impl core::ops::Deref for NSData {
+    type Target = NSObject;
+    #[inline]
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+impl core::ops::DerefMut for NSData {
+    #[inline]
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+unsafe impl Message for NSData {}
+unsafe impl RefEncode for NSData {
+    const ENCODING_REF: Encoding<'static> = Encoding::Object;
+}
+impl NSData {
+    pub unsafe fn alloc() -> Option<Id<Self, Unknown>> {
+        Id::new_null(msg_send![class!(NSData), alloc])
+    }
+}
+impl NSData {
+    pub unsafe fn length(&self) -> NSUInteger {
+        msg_send![self, length]
+    }
+    pub unsafe fn bytes(&self) -> *const c_void {
+        msg_send![self, bytes]
+    }
+}
+impl NSData {
+    pub unsafe fn initWithBytes_length_(
+        this: Id<Self, Unknown>,
+        bytes: *const c_void,
+        length: NSUInteger,
+    ) -> Id<Self, Unknown> {
+        let this = ManuallyDrop::new(this);
+        Id::new(msg_send![this, initWithBytes: bytes, length: length])
+    }
+    pub unsafe fn initWithBytesNoCopy_length_deallocator_(
+        this: Id<Self, Unknown>,
+        bytes: *mut c_void,
+        length: NSUInteger,
+        deallocator: *mut c_void,
+    ) -> Id<Self, Unknown> {
+        let this = ManuallyDrop::new(this);
+        Id::new(msg_send![
+            this,
+            initWithBytesNoCopy: bytes,
+            length: length,
+            deallocator: deallocator,
+        ])
+    }
+}
diff --git a/objc2-foundation/src/data.rs b/objc2-foundation/src/data.rs
index 13a74d0f8..1149afd89 100644
--- a/objc2-foundation/src/data.rs
+++ b/objc2-foundation/src/data.rs
@@ -8,7 +8,7 @@ use objc2::msg_send;
 use objc2::rc::{DefaultId, Id, Owned, Shared};
 use objc2::runtime::{Class, Object};
 
-use super::{NSCopying, NSMutableCopying, NSObject, NSRange};
+use super::{ffi, NSCopying, NSMutableCopying, NSObject, NSRange};
 
 object! {
     unsafe pub struct NSData: NSObject;
@@ -29,8 +29,12 @@ unsafe impl Send for NSMutableData {}
 impl NSData {
     unsafe_def_fn!(fn new -> Shared);
 
+    fn r(&self) -> &ffi::NSData {
+        unsafe { &*(self as *const Self as *const ffi::NSData) }
+    }
+
     pub fn len(&self) -> usize {
-        unsafe { msg_send![self, length] }
+        unsafe { self.r().length() }
     }
 
     pub fn is_empty(&self) -> bool {
@@ -38,12 +42,12 @@ impl NSData {
     }
 
     pub fn bytes(&self) -> &[u8] {
-        let ptr: *const c_void = unsafe { msg_send![self, bytes] };
+        let ptr = unsafe { self.r().bytes() } as *const u8;
         // The bytes pointer may be null for length zero
         if ptr.is_null() {
             &[]
         } else {
-            unsafe { slice::from_raw_parts(ptr as *const u8, self.len()) }
+            unsafe { slice::from_raw_parts(ptr, self.len()) }
         }
     }