diff --git a/plugins/facetapi/query_type_date.inc b/plugins/facetapi/query_type_date.inc
index c1b3946..ff7ebba 100644
--- a/plugins/facetapi/query_type_date.inc
+++ b/plugins/facetapi/query_type_date.inc
@@ -37,6 +37,7 @@ class ApacheSolrFacetapiDate extends FacetapiQueryTypeDate implements FacetapiQu
     $query->addParam('f.' . $this->facet['field'] . '.facet.date.start', $start);
     $query->addParam('f.' . $this->facet['field'] . '.facet.date.end', $end);
     $query->addParam('f.' . $this->facet['field'] . '.facet.date.gap', $gap);
+    $query->addParam('f.' . $this->facet['field'] . '.facet.date.include', 'lower');
 
     // Adds "hard limit" parameter to prevent too many return values.
     $settings = $this->adapter->getFacet($this->facet)->getSettings();