diff --git a/live-build/auto/config b/live-build/auto/config
index a28b6bc6..fbafaa76 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -664,8 +664,10 @@ lb config noauto \
 	"$@"
 
 echo "LB_CHROOT_HOOKS=\"$CHROOT_HOOKS\"" >> config/chroot
+echo "SUBPROJECT=\"$SUBPROJECT\"" >> config/chroot
 echo "LB_BINARY_HOOKS=\"$BINARY_HOOKS\"" >> config/binary
 echo "BUILDSTAMP=\"$NOW\"" >> config/binary
+echo "SUBPROJECT=\"$SUBPROJECT\"" >> config/binary
 
 case $ARCH+$SUBARCH in
 	armhf+raspi2)