diff --git a/library/core/src/num/mod.rs b/library/core/src/num/mod.rs
index 890f5ab2286c6..fdd4831336179 100644
--- a/library/core/src/num/mod.rs
+++ b/library/core/src/num/mod.rs
@@ -460,6 +460,7 @@ impl i128 {
     midpoint_impl! { i128, signed }
 }
 
+#[doc(auto_cfg = false)]
 #[cfg(target_pointer_width = "16")]
 impl isize {
     int_impl! {
@@ -485,6 +486,7 @@ impl isize {
     midpoint_impl! { isize, i32, signed }
 }
 
+#[doc(auto_cfg = false)]
 #[cfg(target_pointer_width = "32")]
 impl isize {
     int_impl! {
@@ -510,6 +512,7 @@ impl isize {
     midpoint_impl! { isize, i64, signed }
 }
 
+#[doc(auto_cfg = false)]
 #[cfg(target_pointer_width = "64")]
 impl isize {
     int_impl! {
@@ -1334,6 +1337,7 @@ impl u128 {
     carrying_carryless_mul_impl! { u128, u256 }
 }
 
+#[doc(auto_cfg = false)]
 #[cfg(target_pointer_width = "16")]
 impl usize {
     uint_impl! {
@@ -1365,6 +1369,7 @@ impl usize {
     carrying_carryless_mul_impl! { usize, u32 }
 }
 
+#[doc(auto_cfg = false)]
 #[cfg(target_pointer_width = "32")]
 impl usize {
     uint_impl! {
@@ -1396,6 +1401,7 @@ impl usize {
     carrying_carryless_mul_impl! { usize, u64 }
 }
 
+#[doc(auto_cfg = false)]
 #[cfg(target_pointer_width = "64")]
 impl usize {
     uint_impl! {