diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 1f38ac88e5..3cf571eea4 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -451,7 +451,7 @@ SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
             req = scsi_req_alloc(&reqops_target_command, d, tag, lun,
                                  hba_private);
         } else {
-            req = d->info->alloc_req(d, tag, lun, hba_private);
+            req = d->info->alloc_req(d, tag, lun, buf, hba_private);
         }
     }
 
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 77673f251a..415f81d1db 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -1598,8 +1598,8 @@ static const SCSIReqOps scsi_disk_reqops = {
     .get_buf      = scsi_get_buf,
 };
 
-static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag,
-                                     uint32_t lun, void *hba_private)
+static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
+                                     uint8_t *buf, void *hba_private)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
     SCSIRequest *req;
diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index 32f50cda3e..2f95f2d967 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -431,7 +431,7 @@ const SCSIReqOps scsi_generic_req_ops = {
 };
 
 static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
-                                     void *hba_private)
+                                     uint8_t *buf, void *hba_private)
 {
     SCSIRequest *req;
 
diff --git a/hw/scsi.h b/hw/scsi.h
index 01c6655f60..8ea744a392 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -94,7 +94,7 @@ struct SCSIDeviceInfo {
     scsi_qdev_initfn init;
     void (*destroy)(SCSIDevice *s);
     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
-                              void *hba_private);
+                              uint8_t *buf, void *hba_private);
     void (*unit_attention_reported)(SCSIDevice *s);
 };