diff --git a/ChangeLog b/ChangeLog
index 522bc4fbc8..54454a54be 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-03-22  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S (MEMCPY):
+	Don't set %rcx twice before "rep movsb".
+
 2016-03-22  H.J. Lu  <hongjiu.lu@intel.com>
 
 	[BZ #19583]
diff --git a/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S b/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S
index 74fed186e9..b615d063c0 100644
--- a/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S
+++ b/sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S
@@ -234,7 +234,6 @@ L(gobble_data_movsb):
 	cmp	%rcx, %rdx
 	jae	L(gobble_big_data_fwd)
 	mov	%rdx, %rcx
-	mov	%rdx, %rcx
 	rep	movsb
 	ret