diff --git a/src/disk.c b/src/disk.c
index c8d218c..bb8ae02 100644
--- a/src/disk.c
+++ b/src/disk.c
@@ -304,6 +304,7 @@ int disk_init(struct usb_device_info * dev) {
 	int maj2;
 	int min1;
 	int min2;
+	int tmp;
 
 	maj1 = -1;
 	maj2 = -1;
@@ -390,6 +391,16 @@ int disk_init(struct usb_device_info * dev) {
 		return -1;
 	}
 
+	/* Ensure that maj1:min1 is first device and maj2:min2 is second device */
+	if ( min2 < min1 ) {
+		tmp = min1;
+		min1 = min2;
+		min2 = tmp;
+		tmp = maj1;
+		maj1 = maj2;
+		maj2 = tmp;
+	}
+
 	/* TODO: change 1 to 0 when disk_flash_dev will be implemented */
 
 	/* RX-51 and RM-680 export MyDocs in first usb device and just first partion, so host system see whole device without MBR table */