diff --git a/apps/dav/lib/CardDAV/CardDavBackend.php b/apps/dav/lib/CardDAV/CardDavBackend.php
index 01d6d7edc389a..6b60d6701d47a 100644
--- a/apps/dav/lib/CardDAV/CardDavBackend.php
+++ b/apps/dav/lib/CardDAV/CardDavBackend.php
@@ -939,11 +939,11 @@ private function readBlob($cardData, &$modified = false) {
 			return $cardData;
 		}
 
-		$cardData = explode("\r\n", $cardData);
+		$cardDataArray = explode("\r\n", $cardData);
 
 		$cardDataFiltered = [];
 		$removingPhoto = false;
-		foreach ($cardData as $line) {
+		foreach ($cardDataArray as $line) {
 			if (strpos($line, 'PHOTO:data:') === 0
 				&& strpos($line, 'PHOTO:data:image/') !== 0) {
 				// Filter out PHOTO data of non-images