diff --git a/src/disk/hdc_ide.c b/src/disk/hdc_ide.c
index 2b6104ee8..0c0453cb1 100644
--- a/src/disk/hdc_ide.c
+++ b/src/disk/hdc_ide.c
@@ -410,7 +410,7 @@ ide_get_max(ide_t *ide, int type)
 		return -1;
 	case TYPE_UDMA:	/* UDMA */
 		if (!ide_boards[ide->board]->force_ata3 && (ide_bm[ide->board] != NULL))
-			return 2;
+			return 4 /*2*/;
 
 		return -1;
 	default:
diff --git a/src/disk/mo.c b/src/disk/mo.c
index 289a3d187..1687d37f3 100644
--- a/src/disk/mo.c
+++ b/src/disk/mo.c
@@ -1983,7 +1983,7 @@ mo_get_max(int ide_has_dma, int type)
 		ret = ide_has_dma ? 1 : -1;
 		break;
 	case TYPE_UDMA:
-		ret = ide_has_dma ? 2 : -1;
+		ret = ide_has_dma ? 4 /*2*/ : -1;
 		break;
     }
 
diff --git a/src/disk/zip.c b/src/disk/zip.c
index 850468573..8a6253100 100644
--- a/src/disk/zip.c
+++ b/src/disk/zip.c
@@ -2243,7 +2243,7 @@ zip_get_max(int ide_has_dma, int type)
 		ret = ide_has_dma ? 1 : -1;
 		break;
 	case TYPE_UDMA:
-		ret = ide_has_dma ? 2 : -1;
+		ret = ide_has_dma ? 4 /*2*/ : -1;
 		break;
     }
 
diff --git a/src/scsi/scsi_cdrom.c b/src/scsi/scsi_cdrom.c
index 2944335ee..106e2bb87 100644
--- a/src/scsi/scsi_cdrom.c
+++ b/src/scsi/scsi_cdrom.c
@@ -2595,7 +2595,7 @@ scsi_cdrom_get_max(int ide_has_dma, int type)
 		ret = ide_has_dma ? 2 : -1;
 		break;
 	case TYPE_UDMA:
-		ret = ide_has_dma ? 2 : -1;
+		ret = ide_has_dma ? 4 /*2*/ : -1;
 		break;
 	default:
 		ret = -1;