diff --git a/sortix/x64/syscall.s b/sortix/x64/syscall.s
index ad9dc3ab..c164a54a 100644
--- a/sortix/x64/syscall.s
+++ b/sortix/x64/syscall.s
@@ -143,7 +143,7 @@ resume_syscall:
 	movq %rsp, %rbp
 
 	movq %rdi, %rax
-	movq %rsi, %r11
+	movq %rdx, %r11
 
 	movq 0(%r11), %rdi
 	movq 8(%r11), %rsi