diff --git a/library/Icingadb/Common/ObjectInspectionDetail.php b/library/Icingadb/Common/ObjectInspectionDetail.php
index 5aaa2a064..d2e6d4338 100644
--- a/library/Icingadb/Common/ObjectInspectionDetail.php
+++ b/library/Icingadb/Common/ObjectInspectionDetail.php
@@ -10,6 +10,7 @@
 use Icinga\Exception\Json\JsonDecodeException;
 use Icinga\Module\Icingadb\Model\Host;
 use Icinga\Module\Icingadb\Model\Service;
+use Icinga\Module\Icingadb\Widget\Detail\CustomVarTable;
 use Icinga\Module\Icingadb\Widget\EmptyState;
 use Icinga\Util\Format;
 use Icinga\Util\Json;
@@ -198,6 +199,28 @@ protected function createAttributes(): array
         ];
     }
 
+    protected function createCustomVariables()
+    {
+        $query = $this->object->customvar
+            ->columns(['name', 'value']);
+
+        $result = [];
+        foreach ($query as $row) {
+            $result[$row->name] = $row->value;
+        }
+
+        if (! empty($result)) {
+            $vars = new CustomVarTable($result);
+        } else {
+            $vars = new EmptyState(t('No custom variables configured.'));
+        }
+
+        return [
+            new HtmlElement('h2', null, Text::create(t('Custom Variables'))),
+            $vars
+        ];
+    }
+
     /**
      * Format the given value as a json
      *
diff --git a/library/Icingadb/Model/Customvar.php b/library/Icingadb/Model/Customvar.php
index 7019d56d7..0d8443ee0 100644
--- a/library/Icingadb/Model/Customvar.php
+++ b/library/Icingadb/Model/Customvar.php
@@ -64,7 +64,7 @@ public function createRelations(Relations $relations)
     protected function mutateValueProperty($json)
     {
         if (is_string($json)) {
-            $data = json_decode($json);
+            $data = json_decode($json, true);
             if ($data !== null) {
                 $json = $data;
             }
diff --git a/library/Icingadb/Widget/Detail/HostInspectionDetail.php b/library/Icingadb/Widget/Detail/HostInspectionDetail.php
index 4603f0e7a..93b35b842 100644
--- a/library/Icingadb/Widget/Detail/HostInspectionDetail.php
+++ b/library/Icingadb/Widget/Detail/HostInspectionDetail.php
@@ -14,6 +14,7 @@ protected function assemble()
             $this->createSourceLocation(),
             $this->createLastCheckResult(),
             $this->createAttributes(),
+            $this->createCustomVariables(),
             $this->createRedisInfo()
         ]);
     }
diff --git a/library/Icingadb/Widget/Detail/ServiceInspectionDetail.php b/library/Icingadb/Widget/Detail/ServiceInspectionDetail.php
index 025def6a5..f29ee9bf0 100644
--- a/library/Icingadb/Widget/Detail/ServiceInspectionDetail.php
+++ b/library/Icingadb/Widget/Detail/ServiceInspectionDetail.php
@@ -14,6 +14,7 @@ protected function assemble()
             $this->createSourceLocation(),
             $this->createLastCheckResult(),
             $this->createAttributes(),
+            $this->createCustomVariables(),
             $this->createRedisInfo()
         ]);
     }