diff --git a/htdocs/admin/barcode.php b/htdocs/admin/barcode.php
index c242f727db2..51d8b3a438c 100644
--- a/htdocs/admin/barcode.php
+++ b/htdocs/admin/barcode.php
@@ -178,10 +178,10 @@ if ($resql)
 
 				if ($module->encodingIsSupported($obj->encoding))
 				{
-					// Build barcode on disk
+					// Build barcode on disk (not used, this is done to make debug easier)
 					$result=$module->writeBarCode($obj->example,$obj->encoding,'Y');
 
-					// Output files with barcode generators
+					// Generate on the fly and output barcode with generator
 					$url=DOL_URL_ROOT.'/viewimage.php?modulepart=barcode&generator='.urlencode($obj->coder).'&code='.urlencode($obj->example).'&encoding='.urlencode($obj->encoding);
 					//print $url;
 					print '<img src="'.$url.'" title="'.$obj->example.'" border="0">';
diff --git a/htdocs/includes/modules/barcode/phpbarcode.modules.php b/htdocs/includes/modules/barcode/phpbarcode.modules.php
index 59fd02d4587..db344179e08 100644
--- a/htdocs/includes/modules/barcode/phpbarcode.modules.php
+++ b/htdocs/includes/modules/barcode/phpbarcode.modules.php
@@ -85,12 +85,12 @@ class modPhpbarcode extends ModeleBarCode
 		return $supported;
 	}
 
-	/**
-	 *		\brief      Return an image file on output
-	 *		\param   	$code			Valeur numérique a coder
-	 *		\param   	$encoding		Mode de codage
-	 *		\param   	$readable		Code lisible
-	 */
+    /**
+	 *		\brief      Return an image file on the fly (no need to write on disk)
+	 *		\param   	$code			Value to encode
+	 *		\param   	$encoding		Mode of encoding
+	 *		\param   	$readable		Code can be read
+     */
 	function buildBarCode($code,$encoding,$readable='Y')
 	{
 		global $_GET,$_ENV,$_SERVER;
@@ -117,10 +117,10 @@ class modPhpbarcode extends ModeleBarCode
 	}
 
 	/**
-	 *		\brief      Save an image file on disk
-	 *		\param   	$code			Valeur numérique a coder
-	 *		\param   	$encoding		Mode de codage
-	 *		\param   	$readable		Code lisible
+	 *		\brief      Save an image file on disk (with no output)
+	 *		\param   	$code			Value to encode
+	 *		\param   	$encoding		Mode of encoding
+	 *		\param   	$readable		Code can be read
 	 */
 	function writeBarCode($code,$encoding,$readable='Y')
 	{