diff --git a/dlls/ntdll/relay.c b/dlls/ntdll/relay.c
index 57ad2e1b588..0ba273189c9 100644
--- a/dlls/ntdll/relay.c
+++ b/dlls/ntdll/relay.c
@@ -624,10 +624,10 @@ __ASM_GLOBAL_FUNC( relay_call,
                    "movq 8(%rsp),%rdx\n\t"
                    "movq 16(%rsp),%r8\n\t"
                    "movq 24(%rsp),%r9\n\t"
-                   "movq %rcx,%xmm0\n\t"
-                   "movq %rdx,%xmm1\n\t"
-                   "movq %r8,%xmm2\n\t"
-                   "movq %r9,%xmm3\n\t"
+                   "movq 0(%rsp),%xmm0\n\t"
+                   "movq 8(%rsp),%xmm1\n\t"
+                   "movq 16(%rsp),%xmm2\n\t"
+                   "movq 24(%rsp),%xmm3\n\t"
                    "callq *%rax\n\t"
                    /* trace the return value */
                    "leaq -0x30(%rbp),%rsp\n\t"