--- orig/distmd5sum
+++ mod/distmd5sum
@@ -76,6 +76,10 @@
     file="$2"
     md5sums="$3"
 
+    if [ -z "${package}" ]; then
+	package='<unknown>'
+    fi
+
     for md5 in ${md5sums}; do
 	debug "MD5 sum in package '${package}': ${md5}"
 	if echo "${md5}  ${file}" | md5sum --check --status; then
