Index: tools/mkuimage.py
===================================================================
--- tools/mkuimage.py	(revision a4a0f1d7c7494d19298310f3c5aee2ec5b01e30b)
+++ tools/mkuimage.py	(revision 0747468d84f2b1c59f16a0b00b33c12aa2a95e3f)
@@ -120,5 +120,5 @@
 	header.start_addr = start_addr	# Address of entry point
 	header.data_crc = data_crc
-	header.os = 5			# Linux
+	header.os = 2			# NetBSD
 	header.arch = 2			# ARM
 	header.img_type = 2		# Kernel