Adapted from:
https://github.com/ipxe/wimboot/commit/47efa60cee9d2cb702b0cd53b71d7ef46cb30735

diff -ur wimboot-2.7.3.orig/src/callback.S wimboot-2.7.3/src/callback.S
--- wimboot-2.7.3.orig/src/callback.S	2021-05-01 00:17:29.000000000 +1000
+++ wimboot-2.7.3/src/callback.S	2024-02-18 08:14:04.221954249 +1100
@@ -47,8 +47,8 @@
 /** Paging bit in CR0 */
 #define CR0_PG 0x80000000
 
-	.arch	i386
 	.code32
+	.arch	i386
 
 	/* Call an arbitrary real-mode function */
 	.section ".text", "ax", @progbits
diff -ur wimboot-2.7.3.orig/src/startup.S wimboot-2.7.3/src/startup.S
--- wimboot-2.7.3.orig/src/startup.S	2021-05-01 00:17:29.000000000 +1000
+++ wimboot-2.7.3/src/startup.S	2024-02-18 08:02:39.764209085 +1100
@@ -31,8 +31,8 @@
 #define KC_CMD 0x64
 #define KC_CMD_RESET 0xfe
 
-	.arch	i386
 	.code32
+	.arch	i386
 
 	/* Startup code */
 	.section ".text", "ax", @progbits