diff --git a/library/stdarch/crates/core_arch/src/arm/ex.rs b/library/stdarch/crates/core_arch/src/arm/ex.rs
index b9d5047a051f..2ad190a78621 100644
--- a/library/stdarch/crates/core_arch/src/arm/ex.rs
+++ b/library/stdarch/crates/core_arch/src/arm/ex.rs
@@ -19,7 +19,7 @@ pub unsafe fn __clrex() {
     clrex()
 }
 
-/// Executes a exclusive LDR instruction for 8 bit value.
+/// Executes an exclusive LDR instruction for 8 bit value.
 // Supported: v6K, v7-M, v7-A, v7-R
 // Not supported: v5, v6, v6-M
 #[cfg(any(
@@ -35,7 +35,7 @@ pub unsafe fn __ldrexb(p: *const u8) -> u8 {
     ldrex8(p) as u8
 }
 
-/// Executes a exclusive LDR instruction for 16 bit value.
+/// Executes an exclusive LDR instruction for 16 bit value.
 // Supported: v6K, v7-M, v7-A, v7-R, v8
 // Not supported: v5, v6, v6-M
 #[cfg(any(
@@ -51,7 +51,7 @@ pub unsafe fn __ldrexh(p: *const u16) -> u16 {
     ldrex16(p) as u16
 }
 
-/// Executes a exclusive LDR instruction for 32 bit value.
+/// Executes an exclusive LDR instruction for 32 bit value.
 // Supported: v6, v7-M, v6K, v7-A, v7-R, v8
 // Not supported: v5, v6-M
 #[cfg(any(
@@ -68,7 +68,7 @@ pub unsafe fn __ldrex(p: *const u32) -> u32 {
     ldrex32(p)
 }
 
-/// Executes a exclusive STR instruction for 8 bit values
+/// Executes an exclusive STR instruction for 8 bit values
 ///
 /// Returns `0` if the operation succeeded, or `1` if it failed
 // supported: v6K, v7-M, v7-A, v7-R
@@ -86,7 +86,7 @@ pub unsafe fn __strexb(value: u32, addr: *mut u8) -> u32 {
     strex8(value, addr)
 }
 
-/// Executes a exclusive STR instruction for 16 bit values
+/// Executes an exclusive STR instruction for 16 bit values
 ///
 /// Returns `0` if the operation succeeded, or `1` if it failed
 // Supported: v6K, v7-M, v7-A, v7-R, v8
@@ -105,7 +105,7 @@ pub unsafe fn __strexh(value: u16, addr: *mut u16) -> u32 {
     strex16(value as u32, addr)
 }
 
-/// Executes a exclusive STR instruction for 32 bit values
+/// Executes an exclusive STR instruction for 32 bit values
 ///
 /// Returns `0` if the operation succeeded, or `1` if it failed
 // Supported: v6, v7-M, v6K, v7-A, v7-R, v8