diff --git a/apps/contactsinteraction/lib/Db/RecentContact.php b/apps/contactsinteraction/lib/Db/RecentContact.php
index 475de09341978..e6c379d0aa15b 100644
--- a/apps/contactsinteraction/lib/Db/RecentContact.php
+++ b/apps/contactsinteraction/lib/Db/RecentContact.php
@@ -66,7 +66,7 @@ public function __construct() {
 		$this->addType('uid', 'string');
 		$this->addType('email', 'string');
 		$this->addType('federatedCloudId', 'string');
-		$this->addType('card', 'string');
+		$this->addType('card', 'blob');
 		$this->addType('lastContact', 'int');
 	}
 }
diff --git a/lib/public/AppFramework/Db/Entity.php b/lib/public/AppFramework/Db/Entity.php
index 954b8787c4c64..34719c82aea76 100644
--- a/lib/public/AppFramework/Db/Entity.php
+++ b/lib/public/AppFramework/Db/Entity.php
@@ -110,7 +110,12 @@ protected function setter($name, $args) {
 
 			// if type definition exists, cast to correct type
 			if ($args[0] !== null && array_key_exists($name, $this->_fieldTypes)) {
-				settype($args[0], $this->_fieldTypes[$name]);
+				$type = $this->_fieldTypes[$name];
+				if ($type === 'blob') {
+					// (B)LOB is treated as string when we read from the DB
+					$type = 'string';
+				}
+				settype($args[0], $type);
 			}
 			$this->$name = $args[0];
 		} else {
diff --git a/lib/public/AppFramework/Db/QBMapper.php b/lib/public/AppFramework/Db/QBMapper.php
index 9b396965706d7..ebbe92e7875f7 100644
--- a/lib/public/AppFramework/Db/QBMapper.php
+++ b/lib/public/AppFramework/Db/QBMapper.php
@@ -230,6 +230,8 @@ protected function getParameterTypeForProperty(Entity $entity, string $property)
 			case 'bool':
 			case 'boolean':
 				return IQueryBuilder::PARAM_BOOL;
+			case 'blob':
+				return IQueryBuilder::PARAM_LOB;
 		}
 
 		return IQueryBuilder::PARAM_STR;