diff --git a/src/WrkLst/DocxMustache/DocxMustache.php b/src/WrkLst/DocxMustache/DocxMustache.php
index 8385381..e4f51dc 100644
--- a/src/WrkLst/DocxMustache/DocxMustache.php
+++ b/src/WrkLst/DocxMustache/DocxMustache.php
@@ -220,7 +220,7 @@ protected function AddContentType($imageCt = 'jpeg')
         //check if content type for jpg has been set
         $i = 0;
         $ct_already_set = false;
-        foreach ($ct_file as $ct) {
+        foreach ($ct_file->Default as $ct) {
             if ((string) $ct_file->Default[$i]['Extension'] == $imageCt) {
                 $ct_already_set = true;
             }