diff --git a/library/std/src/os/uefi/mod.rs b/library/std/src/os/uefi/mod.rs
index 8ef05eee1f4e7..b42d796b28f69 100644
--- a/library/std/src/os/uefi/mod.rs
+++ b/library/std/src/os/uefi/mod.rs
@@ -2,6 +2,7 @@
 
 #![unstable(feature = "uefi_std", issue = "100499")]
 #![doc(cfg(target_os = "uefi"))]
+#![forbid(unsafe_op_in_unsafe_fn)]
 
 pub mod env;
 #[path = "../windows/ffi.rs"]
diff --git a/library/std/src/os/xous/mod.rs b/library/std/src/os/xous/mod.rs
index 153694a89a78d..4b21695c4ac7e 100644
--- a/library/std/src/os/xous/mod.rs
+++ b/library/std/src/os/xous/mod.rs
@@ -1,5 +1,6 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 #![doc(cfg(target_os = "xous"))]
+#![forbid(unsafe_op_in_unsafe_fn)]
 
 pub mod ffi;
 
diff --git a/library/std/src/sys/pal/uefi/mod.rs b/library/std/src/sys/pal/uefi/mod.rs
index 408031a461665..4d50d9e8c3d9c 100644
--- a/library/std/src/sys/pal/uefi/mod.rs
+++ b/library/std/src/sys/pal/uefi/mod.rs
@@ -11,6 +11,7 @@
 //!
 //! [`OsStr`]: crate::ffi::OsStr
 //! [`OsString`]: crate::ffi::OsString
+#![forbid(unsafe_op_in_unsafe_fn)]
 
 pub mod alloc;
 pub mod args;
diff --git a/library/std/src/sys/pal/xous/mod.rs b/library/std/src/sys/pal/xous/mod.rs
index a28a52e305e22..961d45c5e834f 100644
--- a/library/std/src/sys/pal/xous/mod.rs
+++ b/library/std/src/sys/pal/xous/mod.rs
@@ -1,4 +1,4 @@
-#![deny(unsafe_op_in_unsafe_fn)]
+#![forbid(unsafe_op_in_unsafe_fn)]
 
 pub mod alloc;
 #[path = "../unsupported/args.rs"]