diff --git a/client.s b/client.s
index 557898f..a8d670f 100644
--- a/client.s
+++ b/client.s
@@ -48,7 +48,7 @@ client__pollin:
     je client__pollin__no_line
 
     mov rax, 1
-    mov word [pollfds + rdx * pollfd_size + 4], POLLOUT
+    mov word [pollfds + rbx * pollfd_size + 4], POLLOUT
 
 client__pollin__return:
     pop r14