diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade
index abd34bdcfb..ca2eb298dc 100755
--- a/package/base-files/files/sbin/sysupgrade
+++ b/package/base-files/files/sbin/sysupgrade
@@ -127,7 +127,7 @@ list_changed_conffiles() {
 	list_conffiles | while read file csum; do
 		[ -r "$file" ] || continue
 
-		echo "${csum}  ${file}" | sha256sum -sc - || echo "$file"
+		echo "${csum}  ${file}" | busybox sha256sum -sc - || echo "$file"
 	done
 }