diff --git a/htdocs/includes/modules/export/export_excel.modules.php b/htdocs/includes/modules/export/export_excel.modules.php
index 63864456f8b..b6061a245da 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 (BIFF5).';
+		$this->desc='<b>Excel</b> file format (.xls)<br>This is native Excel 95 format.';
 		$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 8c381d02cd1..af826212d03 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 (SpreadsheetML).';
+		$this->desc='<b>Excel</b> file format (.xslx)<br>This is native Excel 2007 format.';
 		$this->extension='xslx';             // Extension for generated file by this driver
         $this->picto='mime/xls';			// Picto
 		$this->version='1.30';             // Driver version
diff --git a/htdocs/lib/files.lib.php b/htdocs/lib/files.lib.php
index d94969be227..a369c1861fb 100644
--- a/htdocs/lib/files.lib.php
+++ b/htdocs/lib/files.lib.php
@@ -235,7 +235,7 @@ function dol_mimetype($file,$default='application/octet-stream',$mode=0)
 	if (preg_match('/\.xls(b|m|x)?$/i',$tmpfile))			   { $mime='application/vnd.ms-excel'; $imgmime='xls.png'; }
 	if (preg_match('/\.xlt(x)?$/i',$tmpfile))				   { $mime='application/vnd.ms-excel'; $imgmime='xls.png'; }
 	if (preg_match('/\.xla(m)?$/i',$tmpfile))				   { $mime='application/vnd.ms-excel'; $imgmime='xls.png'; }
-	if (preg_match('/\.xsl(b|m|x)?$/i',$tmpfile))			   { $mime='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'; $imgmime='xls.png'; }
+	if (preg_match('/\.xsl(b|m|x)?$/i',$tmpfile))			   { $mime='application/vnd.ms-excel'; $imgmime='xls.png'; }
 	if (preg_match('/\.pps(m|x)?$/i',$tmpfile))				   { $mime='application/vnd.ms-powerpoint'; $imgmime='ppt.png'; }
 	if (preg_match('/\.ppt(m|x)?$/i',$tmpfile))				   { $mime='application/x-mspowerpoint'; $imgmime='ppt.png'; }
 	// Other