diff --git a/src/arch/i386/prefix/hdprefix.S b/src/arch/i386/prefix/hdprefix.S
index 876bfe1be..1d012d80b 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 259bc6ba5..64135e14b 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 adfe20410..a1e237de8 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 06e7df5b7..16c79566c 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 032d41e0f..bd0ff339e 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 6e29c7949..465ce4345 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 fa7d1956e..8dc30612a 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