1 files changed, 3 insertions, 1 deletions
diff --git a/tools/ds-identify b/tools/ds-identify
index 30106347..54bd9999 100755
--- a/tools/ds-identify
+++ b/tools/ds-identify
@@ -954,7 +954,9 @@ found() {
         shift
     fi
     # always write the None datasource last.
-    list="${list:+${list}, }None"
+    if [ "$list" != "None" ]; then
+        list="${list:+${list}, }None"
+    fi
     write_result "datasource_list: [ $list ]" "$@"
     return
 }