diff --git a/src/layman/layer/micka/csw.py b/src/layman/layer/micka/csw.py
index f737518a2..d22540167 100644
--- a/src/layman/layer/micka/csw.py
+++ b/src/layman/layer/micka/csw.py
@@ -131,7 +131,7 @@ def get_template_path_and_values(workspace, layername, http_method):
         title or '',
         abstract or ''
     ]))), None)
-    temporal_extent = publ_info['wms'].get('time', {}).get('values', [])
+    temporal_extent = publ_info['wms'].get('time', {}).get('values', None)
 
     geodata_type = publ_info.get('geodata_type')
     if geodata_type == settings.GEODATA_TYPE_VECTOR: