diff --git a/alloc/src/lib.rs b/alloc/src/lib.rs
index 3b039786eb5e..6c5859460500 100644
--- a/alloc/src/lib.rs
+++ b/alloc/src/lib.rs
@@ -86,6 +86,7 @@
 #![warn(multiple_supertrait_upcastable)]
 #![allow(internal_features)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![warn(rustdoc::unescaped_backticks)]
 #![deny(ffi_unwind_calls)]
 //
 // Library features:
diff --git a/core/src/lib.rs b/core/src/lib.rs
index e8f08db94164..a3eca34a35cf 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -103,6 +103,7 @@
 #![deny(ffi_unwind_calls)]
 // Do not check link redundancy on bootstraping phase
 #![allow(rustdoc::redundant_explicit_links)]
+#![warn(rustdoc::unescaped_backticks)]
 //
 // Library features:
 // tidy-alphabetical-start
diff --git a/proc_macro/src/lib.rs b/proc_macro/src/lib.rs
index 57247359fbf2..10dcaa8cd3aa 100644
--- a/proc_macro/src/lib.rs
+++ b/proc_macro/src/lib.rs
@@ -37,6 +37,7 @@
 #![recursion_limit = "256"]
 #![allow(internal_features)]
 #![deny(ffi_unwind_calls)]
+#![warn(rustdoc::unescaped_backticks)]
 
 #[unstable(feature = "proc_macro_internals", issue = "27812")]
 #[doc(hidden)]
diff --git a/std/src/lib.rs b/std/src/lib.rs
index 353fd8d2de8c..7240605bfd65 100644
--- a/std/src/lib.rs
+++ b/std/src/lib.rs
@@ -254,6 +254,7 @@
 #![deny(fuzzy_provenance_casts)]
 #![deny(unsafe_op_in_unsafe_fn)]
 #![allow(rustdoc::redundant_explicit_links)]
+#![warn(rustdoc::unescaped_backticks)]
 // Ensure that std can be linked against panic_abort despite compiled with `-C panic=unwind`
 #![deny(ffi_unwind_calls)]
 // std may use features in a platform-specific way
diff --git a/test/src/lib.rs b/test/src/lib.rs
index 71cb796b9370..db87d923de0e 100644
--- a/test/src/lib.rs
+++ b/test/src/lib.rs
@@ -24,6 +24,7 @@
 #![feature(panic_can_unwind)]
 #![feature(test)]
 #![allow(internal_features)]
+#![warn(rustdoc::unescaped_backticks)]
 
 pub use self::bench::{black_box, Bencher};
 pub use self::console::run_tests_console;