diff --git a/model/Concept.php b/model/Concept.php
index 1e4b8dec6..77a8e79d7 100644
--- a/model/Concept.php
+++ b/model/Concept.php
@@ -296,7 +296,7 @@ public function getProperties()
         $proplabel = $propres->label($this->lang) ? $propres->label($this->lang) : $propres->label();
         $propobj = new ConceptProperty($prop, $proplabel);
 
-        if ($propobj->getLabel()) // only display properties for which we have a label
+        if ($propobj->getLabel() !== null) // only display properties for which we have a label
           $ret[$prop] = $propobj;
 
         // searching for subproperties of literals too