diff --git a/lib/mvcfronk/mfUpload/mfUpload.php b/lib/mvcfronk/mfUpload/mfUpload.php
index 4d747d518..bd2c440f6 100644
--- a/lib/mvcfronk/mfUpload/mfUpload.php
+++ b/lib/mvcfronk/mfUpload/mfUpload.php
@@ -121,16 +121,13 @@ class mfUpload {
       return false;
     }
     
-    /*
-    // false positives if PDF consists of images only
     $pdftext = $this->upload->pdftotext();
     
     //$this->log->debug("text: ".$pdftext);
-    if(strlen($pdftext) < 100) {
-      $this->log->warn("pdftotext less than 100 bytes (".$this->filename.")");
+    if($pdftext === false) {
+      $this->log->warn("pdftotext returned error (".$this->filename.")");
       return false;
     }
-    */
     
     //$this->log->debug("upload text: $pdftext");
     return true;