diff --git a/library/panic_abort/src/lib.rs b/library/panic_abort/src/lib.rs
index a09234e09ff9..a37bfa451732 100644
--- a/library/panic_abort/src/lib.rs
+++ b/library/panic_abort/src/lib.rs
@@ -64,7 +64,7 @@ pub unsafe extern "C" fn __rust_start_panic(_payload: usize) -> u32 {
                     if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
                         asm!("int $$0x29", in("ecx") FAST_FAIL_FATAL_APP_EXIT);
                     } else if #[cfg(target_arch = "arm")] {
-                        asm!("brk 0xDEFB", in("r0") FAST_FAIL_FATAL_APP_EXIT);
+                        asm!(".inst 0xDEFB", in("r0") FAST_FAIL_FATAL_APP_EXIT);
                     } else if #[cfg(target_arch = "aarch64")] {
                         asm!("brk 0xF003", in("x0") FAST_FAIL_FATAL_APP_EXIT);
                     } else {
diff --git a/library/std/src/sys/windows/mod.rs b/library/std/src/sys/windows/mod.rs
index 03ddc3e64618..d3b9a626a9e2 100644
--- a/library/std/src/sys/windows/mod.rs
+++ b/library/std/src/sys/windows/mod.rs
@@ -313,7 +313,7 @@ pub fn abort_internal() -> ! {
                 asm!("int $$0x29", in("ecx") FAST_FAIL_FATAL_APP_EXIT);
                 crate::intrinsics::unreachable();
             } else if #[cfg(target_arch = "arm")] {
-                asm!("brk 0xDEFB", in("r0") FAST_FAIL_FATAL_APP_EXIT);
+                asm!(".inst 0xDEFB", in("r0") FAST_FAIL_FATAL_APP_EXIT);
                 crate::intrinsics::unreachable();
             } else if #[cfg(target_arch = "aarch64")] {
                 asm!("brk 0xF003", in("x0") FAST_FAIL_FATAL_APP_EXIT);