diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 9258e48f95..9f794e4655 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -1445,7 +1445,7 @@ static CXLRetCode cmd_ccls_get_lsa(const struct cxl_cmd *cmd,
     } QEMU_PACKED *get_lsa;
     CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
     CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
-    uint32_t offset, length;
+    uint64_t offset, length;
 
     get_lsa = (void *)payload_in;
     offset = get_lsa->offset;