diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
index 54000de4e..d5f47502a 100644
--- a/core/attributedef.class.inc.php
+++ b/core/attributedef.class.inc.php
@@ -5538,7 +5538,7 @@ class AttributeImage extends AttributeBlob
 	{
 		$iMaxWidthPx = $this->Get('display_max_width');
 		$iMaxHeightPx = $this->Get('display_max_height');
-		$sUrl = $this->Get('default_image');
+		$sUrl = $this->GetOptional('default_image', '');
 		$sRet = '<img src="'.$sUrl.'" style="max-width: '.$iMaxWidthPx.'px; max-height: '.$iMaxHeightPx.'px">';
 		if (is_object($value) && !$value->IsEmpty())
 		{