diff --git a/classes/controller/AdminController.php b/classes/controller/AdminController.php
index d5954f850..53cff973a 100644
--- a/classes/controller/AdminController.php
+++ b/classes/controller/AdminController.php
@@ -2795,7 +2795,7 @@ class AdminControllerCore extends Controller
 	{
 		$content = Tools::file_get_contents($external_file);
 		if ($content)
-			return file_put_contents(_PS_ROOT_DIR_.$file_to_refresh, $content);
+			return (bool)file_put_contents(_PS_ROOT_DIR_.$file_to_refresh, $content);
 		return false;
 	}
 
diff --git a/classes/log/FileLogger.php b/classes/log/FileLogger.php
index a9dee40dd..1f68df9b6 100644
--- a/classes/log/FileLogger.php
+++ b/classes/log/FileLogger.php
@@ -37,7 +37,7 @@ class FileLoggerCore extends AbstractLogger
 	protected function logMessage($message, $level)
 	{
 		$formatted_message = '*'.$this->level_value[$level].'* '."\t".date('Y/m/d - H:i:s').': '.$message."\r\n";
-		return file_put_contents($this->getFilename(), $formatted_message, FILE_APPEND);
+		return (bool)file_put_contents($this->getFilename(), $formatted_message, FILE_APPEND);
 	}
 
 	/**
diff --git a/install-dev/classes/simplexml.php b/install-dev/classes/simplexml.php
index cfbedd25b..d3a761dc9 100644
--- a/install-dev/classes/simplexml.php
+++ b/install-dev/classes/simplexml.php
@@ -65,7 +65,7 @@ class InstallSimplexmlElement extends SimpleXMLElement
 		$dom->loadXML(parent::asXML());
 
 		if ($filename)
-			return file_put_contents($filename, $dom->saveXML());
+			return (bool)file_put_contents($filename, $dom->saveXML());
 		return $dom->saveXML();
 	}
 }
\ No newline at end of file