diff --git a/library/core/src/iter/adapters/enumerate.rs b/library/core/src/iter/adapters/enumerate.rs
index 84e4618844a..10b4db84b39 100644
--- a/library/core/src/iter/adapters/enumerate.rs
+++ b/library/core/src/iter/adapters/enumerate.rs
@@ -129,6 +129,7 @@ where
 
     #[rustc_inherit_overflow_checks]
     #[doc(hidden)]
+    #[inline]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> <Self as Iterator>::Item
     where
         Self: TrustedRandomAccessNoCoerce,
diff --git a/library/core/src/iter/adapters/map.rs b/library/core/src/iter/adapters/map.rs
index 4b03449972c..6cbb35dc7c6 100644
--- a/library/core/src/iter/adapters/map.rs
+++ b/library/core/src/iter/adapters/map.rs
@@ -125,6 +125,7 @@ where
     }
 
     #[doc(hidden)]
+    #[inline]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> B
     where
         Self: TrustedRandomAccessNoCoerce,
diff --git a/library/core/src/iter/adapters/zip.rs b/library/core/src/iter/adapters/zip.rs
index f50e71da20f..de44bd66501 100644
--- a/library/core/src/iter/adapters/zip.rs
+++ b/library/core/src/iter/adapters/zip.rs
@@ -554,6 +554,7 @@ pub unsafe trait TrustedRandomAccessNoCoerce: Sized {
 ///
 /// Same requirements calling `get_unchecked` directly.
 #[doc(hidden)]
+#[inline]
 pub(in crate::iter::adapters) unsafe fn try_get_unchecked<I>(it: &mut I, idx: usize) -> I::Item
 where
     I: Iterator,
@@ -576,6 +577,7 @@ unsafe impl<I: Iterator> SpecTrustedRandomAccess for I {
 }
 
 unsafe impl<I: Iterator + TrustedRandomAccessNoCoerce> SpecTrustedRandomAccess for I {
+    #[inline]
     unsafe fn try_get_unchecked(&mut self, index: usize) -> Self::Item {
         // SAFETY: the caller must uphold the contract for
         // `Iterator::__iterator_get_unchecked`.
diff --git a/library/core/src/slice/iter/macros.rs b/library/core/src/slice/iter/macros.rs
index b74ab28fc09..78bf3381b4d 100644
--- a/library/core/src/slice/iter/macros.rs
+++ b/library/core/src/slice/iter/macros.rs
@@ -326,6 +326,7 @@ macro_rules! iterator {
             }
 
             #[doc(hidden)]
+            #[inline]
             unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> Self::Item {
                 // SAFETY: the caller must guarantee that `i` is in bounds of
                 // the underlying slice, so `i` cannot overflow an `isize`, and