diff --git a/src/disk/zip.c b/src/disk/zip.c
index 5e962115c..8c03f861a 100644
--- a/src/disk/zip.c
+++ b/src/disk/zip.c
@@ -2368,7 +2368,7 @@ zip_hard_reset(void)
 		zip_log("ZIP hard_reset drive=%d\n", c);
 
 		/* Make sure to ignore any SCSI ZIP drive that has an out of range ID. */
-		if ((zip_drives[c].bus_type == ZIP_BUS_SCSI) && (zip_drives[c].scsi_device_id > SCSI_ID_MAX))
+		if ((zip_drives[c].bus_type == ZIP_BUS_SCSI) && (zip_drives[c].scsi_device_id >= SCSI_ID_MAX))
 			continue;
 
 		/* Make sure to ignore any ATAPI ZIP drive that has an out of range IDE channel. */
diff --git a/src/scsi/scsi_cdrom.c b/src/scsi/scsi_cdrom.c
index 72d3b2e2a..3667567fc 100644
--- a/src/scsi/scsi_cdrom.c
+++ b/src/scsi/scsi_cdrom.c
@@ -2545,7 +2545,7 @@ scsi_cdrom_drive_reset(int c)
     ide_t *id;
 
     /* Make sure to ignore any SCSI CD-ROM drive that has an out of range ID. */
-    if ((drv->bus_type == CDROM_BUS_SCSI) && (drv->scsi_device_id > SCSI_ID_MAX))
+    if ((drv->bus_type == CDROM_BUS_SCSI) && (drv->scsi_device_id >= SCSI_ID_MAX))
 	return;
 
     /* Make sure to ignore any ATAPI CD-ROM drive that has an out of range IDE channel. */
diff --git a/src/scsi/scsi_disk.c b/src/scsi/scsi_disk.c
index 91256b4dc..6203a7ac4 100644
--- a/src/scsi/scsi_disk.c
+++ b/src/scsi/scsi_disk.c
@@ -1212,7 +1212,7 @@ scsi_disk_hard_reset(void)
 		scsi_disk_log("SCSI disk hard_reset drive=%d\n", c);
 
 		/* Make sure to ignore any SCSI disk that has an out of range ID. */
-		if (hdd[c].scsi_id > SCSI_ID_MAX)
+		if (hdd[c].scsi_id >= SCSI_ID_MAX)
 			continue;
 
 		/* Make sure to ignore any SCSI disk whose image file name is empty. */