diff --git a/lib/Service/SignFileService.php b/lib/Service/SignFileService.php
index b81f80ea02..08c2f92ebb 100644
--- a/lib/Service/SignFileService.php
+++ b/lib/Service/SignFileService.php
@@ -279,12 +279,12 @@ public function setVisibleElements(array $list): self {
 
 	public function sign(): File {
 		$fileToSign = $this->getFileToSing($this->libreSignFile);
-		$pfxFile = $this->getPfxFile();
+		$pfxFileContent = $this->getPfxFile();
 		switch ($fileToSign->getExtension()) {
 			case 'pdf':
 				$signedFile = $this->pkcs12Handler
 					->setInputFile($fileToSign)
-					->setCertificate($pfxFile)
+					->setCertificate($pfxFileContent)
 					->setVisibleElements($this->elements)
 					->setPassword($this->password)
 					->sign();
@@ -292,7 +292,7 @@ public function sign(): File {
 			default:
 				$signedFile = $this->pkcs7Handler
 					->setInputFile($fileToSign)
-					->setCertificate($pfxFile)
+					->setCertificate($pfxFileContent)
 					->setPassword($this->password)
 					->sign();
 		}