diff --git a/library/stdarch/crates/core_arch/src/arm_shared/barrier/cp15.rs b/library/stdarch/crates/core_arch/src/arm_shared/barrier/cp15.rs
index 6faae0fee0ba..fe540a7d8dc7 100644
--- a/library/stdarch/crates/core_arch/src/arm_shared/barrier/cp15.rs
+++ b/library/stdarch/crates/core_arch/src/arm_shared/barrier/cp15.rs
@@ -11,7 +11,8 @@ impl super::super::sealed::Dmb for SY {
     #[inline(always)]
     unsafe fn __dmb(&self) {
         asm!(
-            "mcr p15, 0, r0, c7, c10, 5",
+            "mcr p15, 0, {}, c7, c10, 5",
+            in(reg) 0_u32,
             options(preserves_flags, nostack)
         )
     }
@@ -21,7 +22,8 @@ impl super::super::sealed::Dsb for SY {
     #[inline(always)]
     unsafe fn __dsb(&self) {
         asm!(
-            "mcr p15, 0, r0, c7, c10, 4",
+            "mcr p15, 0, {}, c7, c10, 4",
+            in(reg) 0_u32,
             options(preserves_flags, nostack)
         )
     }
@@ -31,7 +33,8 @@ impl super::super::sealed::Isb for SY {
     #[inline(always)]
     unsafe fn __isb(&self) {
         asm!(
-            "mcr p15, 0, r0, c7, c5, 4",
+            "mcr p15, 0, {}, c7, c5, 4",
+            in(reg) 0_u32,
             options(preserves_flags, nostack)
         )
     }