diff --git a/src/disk/mo.c b/src/disk/mo.c
index 5494fc9a8..7808e524e 100644
--- a/src/disk/mo.c
+++ b/src/disk/mo.c
@@ -1461,6 +1461,7 @@ mo_command(scsi_common_t *sc, const uint8_t *cdb)
             break;
 
         case GPCMD_WRITE_SAME_10:
+            mo_set_phase(dev, SCSI_PHASE_DATA_OUT);
             alloc_length = 512;
 
             if ((cdb[1] & 6) == 6)
diff --git a/src/disk/zip.c b/src/disk/zip.c
index 72781281a..f579f23ec 100644
--- a/src/disk/zip.c
+++ b/src/disk/zip.c
@@ -1506,6 +1506,7 @@ zip_command(scsi_common_t *sc, const uint8_t *cdb)
             break;
 
         case GPCMD_WRITE_SAME_10:
+            zip_set_phase(dev, SCSI_PHASE_DATA_OUT);
             alloc_length = 512;
 
             if ((cdb[1] & 6) == 6)