diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 27fadc4..2aa7ffe 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -947,7 +947,7 @@
      * the only possible failure would be if the mailbox itself isn't big
      * enough.
      */
-    if (get_log->offset + get_log->length > cci->payload_max) {
+    if (get_log->length > cci->payload_max) {
         return CXL_MBOX_INVALID_INPUT;
     }