diff --git a/common/jpeg/simd/jiss2red-64.asm b/common/jpeg/simd/jiss2red-64.asm
index 85ba941..eddaded 100644
--- a/common/jpeg/simd/jiss2red-64.asm
+++ b/common/jpeg/simd/jiss2red-64.asm
@@ -121,7 +121,7 @@
 	mov	rax,rsp				; rax = original rbp
 	sub	rsp, byte 4
 	and	rsp, byte (-SIZEOF_XMMWORD)	; align to 128 bits
-	mov	[rsp],eax
+	mov	[rsp],rax
 	mov	rbp,rsp				; rbp = aligned rbp
 	lea	rsp, [wk(0)]
 	collect_args