diff --git a/src/arch/i386/prefix/hdprefix.S b/src/arch/i386/prefix/hdprefix.S
index 876bfe1b..1d012d80 100644
--- a/src/arch/i386/prefix/hdprefix.S
+++ b/src/arch/i386/prefix/hdprefix.S
@@ -1,4 +1,4 @@
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 	.text
 	.arch i386
diff --git a/src/arch/i386/prefix/lkrnprefix.S b/src/arch/i386/prefix/lkrnprefix.S
index 259bc6ba..64135e14 100644
--- a/src/arch/i386/prefix/lkrnprefix.S
+++ b/src/arch/i386/prefix/lkrnprefix.S
@@ -1,4 +1,4 @@
-FILE_LICENCE ( GPL_ANY )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 #define BZI_LOAD_HIGH_ADDR 0x100000
 
diff --git a/src/arch/i386/prefix/mbr.S b/src/arch/i386/prefix/mbr.S
index adfe2041..a1e237de 100644
--- a/src/arch/i386/prefix/mbr.S
+++ b/src/arch/i386/prefix/mbr.S
@@ -1,3 +1,5 @@
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
+
 	.text
 	.arch i386
 	.section ".prefix", "awx", @progbits
diff --git a/src/arch/i386/prefix/nbiprefix.S b/src/arch/i386/prefix/nbiprefix.S
index 06e7df5b..16c79566 100644
--- a/src/arch/i386/prefix/nbiprefix.S
+++ b/src/arch/i386/prefix/nbiprefix.S
@@ -1,3 +1,5 @@
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
+
 	.text
 	.arch i386
 	.code16
diff --git a/src/arch/i386/prefix/nullprefix.S b/src/arch/i386/prefix/nullprefix.S
index 032d41e0..bd0ff339 100644
--- a/src/arch/i386/prefix/nullprefix.S
+++ b/src/arch/i386/prefix/nullprefix.S
@@ -1,3 +1,5 @@
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
+
 	.org	0
 	.text
 	.arch i386
diff --git a/src/arch/i386/prefix/pxeprefix.S b/src/arch/i386/prefix/pxeprefix.S
index 6e29c794..465ce434 100644
--- a/src/arch/i386/prefix/pxeprefix.S
+++ b/src/arch/i386/prefix/pxeprefix.S
@@ -1,4 +1,4 @@
-FILE_LICENCE ( GPL2_OR_LATER )
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
 
 #define PXENV_UNDI_SHUTDOWN		0x0005
 #define	PXENV_UNDI_GET_NIC_TYPE		0x0012
diff --git a/src/arch/i386/prefix/usbdisk.S b/src/arch/i386/prefix/usbdisk.S
index fa7d1956..8dc30612 100644
--- a/src/arch/i386/prefix/usbdisk.S
+++ b/src/arch/i386/prefix/usbdisk.S
@@ -1,3 +1,5 @@
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
+
 	.text
 	.arch i386
 	.section ".prefix", "awx", @progbits