diff --git a/tools/tools/nanobsd/defaults.sh b/tools/tools/nanobsd/defaults.sh
--- a/tools/tools/nanobsd/defaults.sh
+++ b/tools/tools/nanobsd/defaults.sh
@@ -776,6 +776,10 @@
 	populate_slice "$1" "$2" "$3" "$4"
 )
 
+_populate_data_part ( ) (
+	_populate_part "data" "$1" "$2" "$3" "$4" "$5"
+)
+
 last_orders ( ) (
 	# Redefine this function with any last orders you may have
 	# after the build completed, for instance to copy the finished