diff --git a/Classes/Domain/Extractor/ExifExtractor.php b/Classes/Domain/Extractor/ExifExtractor.php
index 14df0f7..af47cf7 100644
--- a/Classes/Domain/Extractor/ExifExtractor.php
+++ b/Classes/Domain/Extractor/ExifExtractor.php
@@ -191,9 +191,9 @@ public function extractMetaData(FlowResource $resource, MetaDataCollection $meta
                 }
             }
         }
-        
-        if (isset($exifData['PhotographicSensitivity']) && is_array($exifData['PhotographicSensitivity'])) {
-            $exifData['PhotographicSensitivity'] = (int)current($exifData['PhotographicSensitivity']);
+
+        if (isset($exifData['PhotographicSensitivity']) && \is_array($exifData['PhotographicSensitivity'])) {
+            $exifData['PhotographicSensitivity'] = (int)\current($exifData['PhotographicSensitivity']);
         }
 
         if (isset($exifData['GPSVersionID'])) {