diff --git a/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S b/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
index 5e11540..c214d11 100644
--- a/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
+++ b/sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
@@ -63,7 +63,7 @@ ENTRY(____longjmp_chk)
 
 	/* Save function parameters.  */
 	movq	%rdi, %r10
-	movl	%esi, %ecx
+	movl	%esi, %ebx
 
 	xorl	%edi, %edi
 	leaq	-24(%rsp), %rsi
@@ -84,7 +84,7 @@ ENTRY(____longjmp_chk)
 .Lfail:	CALL_FAIL
 
 .Lok2:	movq	%r10, %rdi
-	movl	%ecx, %esi
+	movl	%ebx, %esi
 
 .Lok:	/* We add unwind information for the target here.  */
 	cfi_def_cfa(%rdi, 0)