diff --git a/compiler/rustc_codegen_ssa/src/mir/block.rs b/compiler/rustc_codegen_ssa/src/mir/block.rs
index be9a6d9a90e..e3553dc03e1 100644
--- a/compiler/rustc_codegen_ssa/src/mir/block.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/block.rs
@@ -992,10 +992,10 @@ fn codegen_call_terminator(
                 match op.val {
                     Pair(data_ptr, meta) => {
                         // In the case of Rc<Self>, we need to explicitly pass a
-                        // *mut RcBox<Self> with a Scalar (not ScalarPair) ABI. This is a hack
+                        // *mut RcInner<Self> with a Scalar (not ScalarPair) ABI. This is a hack
                         // that is understood elsewhere in the compiler as a method on
                         // `dyn Trait`.
-                        // To get a `*mut RcBox<Self>`, we just keep unwrapping newtypes until
+                        // To get a `*mut RcInner<Self>`, we just keep unwrapping newtypes until
                         // we get a value of a built-in pointer type.
                         //
                         // This is also relevant for `Pin<&mut Self>`, where we need to peel the
diff --git a/compiler/rustc_ty_utils/src/abi.rs b/compiler/rustc_ty_utils/src/abi.rs
index deda16b76b5..7354ea5fb6a 100644
--- a/compiler/rustc_ty_utils/src/abi.rs
+++ b/compiler/rustc_ty_utils/src/abi.rs
@@ -822,10 +822,10 @@ fn make_thin_self_ptr<'tcx>(
             _ => bug!("receiver type has unsupported layout: {:?}", layout),
         }
 
-        // In the case of Rc<Self>, we need to explicitly pass a *mut RcBox<Self>
+        // In the case of Rc<Self>, we need to explicitly pass a *mut RcInner<Self>
         // with a Scalar (not ScalarPair) ABI. This is a hack that is understood
         // elsewhere in the compiler as a method on a `dyn Trait`.
-        // To get the type `*mut RcBox<Self>`, we just keep unwrapping newtypes until we
+        // To get the type `*mut RcInner<Self>`, we just keep unwrapping newtypes until we
         // get a built-in pointer type
         let mut wide_pointer_layout = layout;
         while !wide_pointer_layout.ty.is_unsafe_ptr() && !wide_pointer_layout.ty.is_ref() {
@@ -838,7 +838,7 @@ fn make_thin_self_ptr<'tcx>(
         wide_pointer_layout.ty
     };
 
-    // we now have a type like `*mut RcBox<dyn Trait>`
+    // we now have a type like `*mut RcInner<dyn Trait>`
     // change its layout to that of `*mut ()`, a thin pointer, but keep the same type
     // this is understood as a special case elsewhere in the compiler
     let unit_ptr_ty = Ty::new_mut_ptr(tcx, tcx.types.unit);
diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index 5d099a49854..4632f995b82 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -319,7 +319,7 @@ pub struct Weak<
     // but it is not necessarily a valid pointer.
     // `Weak::new` sets this to `usize::MAX` so that it doesn’t need
     // to allocate space on the heap. That's not a value a real pointer
-    // will ever have because RcBox has alignment at least 2.
+    // will ever have because RcInner has alignment at least 2.
     // This is only possible when `T: Sized`; unsized `T` never dangle.
     ptr: NonNull<ArcInner<T>>,
     alloc: A,
@@ -1581,7 +1581,7 @@ pub fn into_raw_with_allocator(this: Self) -> (*const T, A) {
     pub fn as_ptr(this: &Self) -> *const T {
         let ptr: *mut ArcInner<T> = NonNull::as_ptr(this.ptr);
 
-        // SAFETY: This cannot go through Deref::deref or RcBoxPtr::inner because
+        // SAFETY: This cannot go through Deref::deref or RcInnerPtr::inner because
         // this is required to retain raw/mut provenance such that e.g. `get_mut` can
         // write through the pointer after the Rc is recovered through `from_raw`.
         unsafe { &raw mut (*ptr).data }
@@ -2936,7 +2936,7 @@ pub unsafe fn from_raw_in(ptr: *const T, alloc: A) -> Self {
             // Otherwise, we're guaranteed the pointer came from a nondangling Weak.
             // SAFETY: data_offset is safe to call, as ptr references a real (potentially dropped) T.
             let offset = unsafe { data_offset(ptr) };
-            // Thus, we reverse the offset to get the whole RcBox.
+            // Thus, we reverse the offset to get the whole RcInner.
             // SAFETY: the pointer originated from a Weak, so this offset is safe.
             unsafe { ptr.byte_sub(offset) as *mut ArcInner<T> }
         };
@@ -3861,7 +3861,7 @@ impl<T: ?Sized, A: Allocator> Unpin for Arc<T, A> {}
 /// valid instance of T, but the T is allowed to be dropped.
 unsafe fn data_offset<T: ?Sized>(ptr: *const T) -> usize {
     // Align the unsized value to the end of the ArcInner.
-    // Because RcBox is repr(C), it will always be the last field in memory.
+    // Because RcInner is repr(C), it will always be the last field in memory.
     // SAFETY: since the only unsized types possible are slices, trait objects,
     // and extern types, the input safety requirement is currently enough to
     // satisfy the requirements of align_of_val_raw; this is an implementation
diff --git a/library/core/src/cell.rs b/library/core/src/cell.rs
index 8ccd1a44ff1..513b9cbcefc 100644
--- a/library/core/src/cell.rs
+++ b/library/core/src/cell.rs
@@ -193,11 +193,11 @@
 //! use std::marker::PhantomData;
 //!
 //! struct Rc<T: ?Sized> {
-//!     ptr: NonNull<RcBox<T>>,
-//!     phantom: PhantomData<RcBox<T>>,
+//!     ptr: NonNull<RcInner<T>>,
+//!     phantom: PhantomData<RcInner<T>>,
 //! }
 //!
-//! struct RcBox<T: ?Sized> {
+//! struct RcInner<T: ?Sized> {
 //!     strong: Cell<usize>,
 //!     refcount: Cell<usize>,
 //!     value: T,
@@ -213,9 +213,9 @@
 //!     }
 //! }
 //!
-//! trait RcBoxPtr<T: ?Sized> {
+//! trait RcInnerPtr<T: ?Sized> {
 //!
-//!     fn inner(&self) -> &RcBox<T>;
+//!     fn inner(&self) -> &RcInner<T>;
 //!
 //!     fn strong(&self) -> usize {
 //!         self.inner().strong.get()
@@ -230,8 +230,8 @@
 //!     }
 //! }
 //!
-//! impl<T: ?Sized> RcBoxPtr<T> for Rc<T> {
-//!    fn inner(&self) -> &RcBox<T> {
+//! impl<T: ?Sized> RcInnerPtr<T> for Rc<T> {
+//!    fn inner(&self) -> &RcInner<T> {
 //!        unsafe {
 //!            self.ptr.as_ref()
 //!        }
diff --git a/src/etc/lldb_providers.py b/src/etc/lldb_providers.py
index 8750d7682d1..bace228454e 100644
--- a/src/etc/lldb_providers.py
+++ b/src/etc/lldb_providers.py
@@ -670,11 +670,11 @@ def StdRcSummaryProvider(valobj, dict):
 class StdRcSyntheticProvider:
     """Pretty-printer for alloc::rc::Rc<T> and alloc::sync::Arc<T>
 
-    struct Rc<T> { ptr: NonNull<RcBox<T>>, ... }
+    struct Rc<T> { ptr: NonNull<RcInner<T>>, ... }
     rust 1.31.1: struct NonNull<T> { pointer: NonZero<*const T> }
     rust 1.33.0: struct NonNull<T> { pointer: *const T }
     struct NonZero<T>(T)
-    struct RcBox<T> { strong: Cell<usize>, weak: Cell<usize>, value: T }
+    struct RcInner<T> { strong: Cell<usize>, weak: Cell<usize>, value: T }
     struct Cell<T> { value: UnsafeCell<T> }
     struct UnsafeCell<T> { value: T }
 
diff --git a/src/etc/natvis/liballoc.natvis b/src/etc/natvis/liballoc.natvis
index 49d82dfad82..1528a8b1226 100644
--- a/src/etc/natvis/liballoc.natvis
+++ b/src/etc/natvis/liballoc.natvis
@@ -95,7 +95,7 @@
       <Item Name="[Weak reference count]">ptr.pointer.data_ptr->weak</Item>
       <ArrayItems>
         <Size>ptr.pointer.length</Size>
-        <!-- We add +2 to the data_ptr in order to skip the ref count fields in the RcBox -->
+        <!-- We add +2 to the data_ptr in order to skip the ref count fields in the RcInner -->
         <ValuePointer>($T1*)(((size_t*)ptr.pointer.data_ptr) + 2)</ValuePointer>
       </ArrayItems>
     </Expand>
diff --git a/src/tools/miri/tests/fail/memleak_rc.stderr b/src/tools/miri/tests/fail/memleak_rc.stderr
index 820e10743bc..df12eeed6ac 100644
--- a/src/tools/miri/tests/fail/memleak_rc.stderr
+++ b/src/tools/miri/tests/fail/memleak_rc.stderr
@@ -1,8 +1,8 @@
 error: memory leaked: ALLOC (Rust heap, SIZE, ALIGN), allocated here:
   --> RUSTLIB/alloc/src/rc.rs:LL:CC
    |
-LL |                 Box::leak(Box::new(RcBox { strong: Cell::new(1), weak: Cell::new(1), value }))
-   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+LL |                 Box::leak(Box::new(RcInner { strong: Cell::new(1), weak: Cell::new(1), value }))
+   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: BACKTRACE:
    = note: inside `std::rc::Rc::<std::cell::RefCell<std::option::Option<Dummy>>>::new` at RUSTLIB/alloc/src/rc.rs:LL:CC
diff --git a/tests/debuginfo/strings-and-strs.rs b/tests/debuginfo/strings-and-strs.rs
index b7ee3312d13..3d6589db34b 100644
--- a/tests/debuginfo/strings-and-strs.rs
+++ b/tests/debuginfo/strings-and-strs.rs
@@ -19,8 +19,7 @@
 // gdb-check:$4 = ("Hello", "World")
 
 // gdb-command:print str_in_rc
-// gdb-check:$5 = alloc::rc::Rc<&str, alloc::alloc::Global> {ptr: core::ptr::non_null::NonNull<alloc::rc::RcBox<&str>> {pointer: 0x[...]}, phantom: core::marker::PhantomData<alloc::rc::RcBox<&str>>, alloc: alloc::alloc::Global}
-
+// gdb-check:$5 = alloc::rc::Rc<&str, alloc::alloc::Global> {ptr: core::ptr::non_null::NonNull<alloc::rc::RcInner<&str>> {pointer: 0x[...]}, phantom: core::marker::PhantomData<alloc::rc::RcInner<&str>>, alloc: alloc::alloc::Global}
 
 // === LLDB TESTS ==================================================================================
 // lldb-command:run
diff --git a/tests/ui/abi/compatibility.rs b/tests/ui/abi/compatibility.rs
index b439a4bcf86..28c8063a923 100644
--- a/tests/ui/abi/compatibility.rs
+++ b/tests/ui/abi/compatibility.rs
@@ -160,14 +160,14 @@ pub struct Unique<T: ?Sized> {
     pub struct Box<T: ?Sized, A = Global>(Unique<T>, A);
 
     #[repr(C)]
-    struct RcBox<T: ?Sized> {
+    struct RcInner<T: ?Sized> {
         strong: UnsafeCell<usize>,
         weak: UnsafeCell<usize>,
         value: T,
     }
     pub struct Rc<T: ?Sized, A = Global> {
-        ptr: NonNull<RcBox<T>>,
-        phantom: PhantomData<RcBox<T>>,
+        ptr: NonNull<RcInner<T>>,
+        phantom: PhantomData<RcInner<T>>,
         alloc: A,
     }