diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c
index 9159f48..2b9cf0c 100644
--- a/hw/pci-bridge/cxl_upstream.c
+++ b/hw/pci-bridge/cxl_upstream.c
@@ -262,7 +262,7 @@
                 .length = sslbis_size,
             },
             .data_type = HMATLB_DATA_TYPE_ACCESS_BANDWIDTH,
-            .entry_base_unit = 1000,
+            .entry_base_unit = 1024,
         },
     };