diff --git a/SeedDMS_Core/Core/inc.ClassDMS.php b/SeedDMS_Core/Core/inc.ClassDMS.php
index 58720b1a7..ed6e10995 100644
--- a/SeedDMS_Core/Core/inc.ClassDMS.php
+++ b/SeedDMS_Core/Core/inc.ClassDMS.php
@@ -3567,6 +3567,46 @@ class SeedDMS_Core_DMS {
 
 	} /* }}} */
 
+	/**
+	 * Returns document content which has the incorrect file type
+	 *
+	 * This method is for finding document content with an incorrect
+	 * or missing file type. It just checks documents contents
+	 * with a certain mime type.
+	 * @return bool|SeedDMS_Core_Document[]
+	 */
+	function getWrongFiletypeDocumentContent() { /* {{{ */
+		$queryStr = "SELECT * FROM `tblDocumentContent` WHERE `mimeType` in ('application/pdf', 'image/png', 'image/gif', 'image/jpg')";
+		$resArr = $this->db->getResultArray($queryStr);
+		if ($resArr === false)
+			return false;
+
+		/** @var SeedDMS_Core_Document[] $versions */
+		$versions = array();
+		foreach($resArr as $row) {
+			$expect = '';
+			switch($row['mimeType']) {
+			case "application/pdf":
+			case "image/png":
+			case "image/gif":
+			case "image/jpg":
+				$expect = substr($row['mimeType'], -3, 3);
+				break;
+			}
+			if($expect) {
+				if($row['fileType'] != '.'.$expect) {
+					/** @var SeedDMS_Core_Document $document */
+					$document = new $this->classnames['document']($row['document'], '', '', '', '', '', '', '', '', '', '', '');
+					$document->setDMS($this);
+					$version = new $this->classnames['documentcontent']($row['id'], $document, $row['version'], $row['comment'], $row['date'], $row['createdBy'], $row['dir'], $row['orgFileName'], $row['fileType'], $row['mimeType'], $row['fileSize'], $row['checksum']);
+					$versions[] = $version;
+				}
+			}
+		}
+		return $versions;
+
+	} /* }}} */
+
 	/**
 	 * Returns document content which is duplicated
 	 *