diff --git a/ChangeLog b/ChangeLog
index f3c4c14..fbf372d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,10 @@
 # Copyright 2006-2008 Gentoo Foundation; Distributed under the GPL v2
 # $Header: $
 
+  13 Mar 2008; Andrew Gaffney <agaffney@gentoo.org> genkernel:
+  Add debugging code to show ARCH when running callback
+  Unset ARCH when running callback and restore afterwards
+
   13 Mar 2008; Andrew Gaffney <agaffney@gentoo.org> genkernel:
   Move set_kernel_arch() call to after determine_real_args() so that get_KV()
   has populated the vars we need
diff --git a/genkernel b/genkernel
index 30608b5..552205b 100755
--- a/genkernel
+++ b/genkernel
@@ -280,11 +280,15 @@ then
 	if [ "${CALLBACK_ESCAPE}" -eq '0' ]
 	then
 		echo
+		echo "DEBUG: callback: ARCH=${ARCH}"
+		ORIG_ARCH=${ARCH}
+		unset ARCH
 		echo
 		eval ${CMD_CALLBACK} | tee -a ${LOGFILE}
 		CMD_STATUS="${PIPESTATUS[0]}"
 		echo
 		print_info 1 "<<< Callback exit status: ${CMD_STATUS}"
+		export ARCH=${ORIG_ARCH}
 		[ "${CMD_STATUS}" -ne 0 ] && gen_die '--callback failed!'
 	else
 		echo