diff --git a/htdocs/includes/modules/export/export_excel.modules.php b/htdocs/includes/modules/export/export_excel.modules.php
index b6061a245da..63864456f8b 100644
--- a/htdocs/includes/modules/export/export_excel.modules.php
+++ b/htdocs/includes/modules/export/export_excel.modules.php
@@ -58,7 +58,7 @@ class ExportExcel extends ModeleExports
 
 		$this->id='excel';                  // Same value then xxx in file name export_xxx.modules.php
 		$this->label='Excel 95';             // Label of driver
-		$this->desc='<b>Excel</b> file format (.xls)<br>This is native Excel 95 format.';
+		$this->desc='<b>Excel</b> file format (.xls)<br>This is native Excel 95 format (BIFF5).';
 		$this->extension='xls';             // Extension for generated file by this driver
         $this->picto='mime/xls';					// Picto
 		$this->version='1.30';             // Driver version
diff --git a/htdocs/includes/modules/export/export_excel2007.modules.php b/htdocs/includes/modules/export/export_excel2007.modules.php
index af826212d03..8c381d02cd1 100755
--- a/htdocs/includes/modules/export/export_excel2007.modules.php
+++ b/htdocs/includes/modules/export/export_excel2007.modules.php
@@ -59,7 +59,7 @@ class ExportExcel2007 extends ExportExcel
 
 		$this->id='excel2007';                  // Same value then xxx in file name export_xxx.modules.php
 		$this->label='Excel 2007';               // Label of driver
-		$this->desc='<b>Excel</b> file format (.xslx)<br>This is native Excel 2007 format.';
+		$this->desc='<b>Excel</b> file format (.xslx)<br>This is native Excel 2007 format (SpreadsheetML).';
 		$this->extension='xslx';             // Extension for generated file by this driver
         $this->picto='mime/xls';			// Picto
 		$this->version='1.30';             // Driver version