diff --git a/include/class/class_document_export.php b/include/class/class_document_export.php
index c0791357c..e09ae919b 100644
--- a/include/class/class_document_export.php
+++ b/include/class/class_document_export.php
@@ -234,11 +234,11 @@ class Document_Export
     {
         try 
         {
-            if (CONVERT_GIF_PDF == 'NOT')    throw new Exception(_("CONVERT_GIF_PDF n'est pas installé"));
-            if (PDFTK          == 'NOT')     throw new Exception(_("TKPDF n'est pas installé"));
+            if (CONVERT_GIF_PDF == 'NOT') throw new Exception(_("CONVERT_GIF_PDF n'est pas installé"));
+            if (PDFTK          == 'NOT')  throw new Exception(_("TKPDF n'est pas installé"));
             if ( FIX_BROKEN_PDF == 'YES') {
-                if (PS2PDF == 'NOT')                    throw new Exception(_('PS2PDF non installé'));
-                if (PDF2PS == 'NOT')                    throw new Exception(_('PDF2PS non installé'));
+                if (PS2PDF == 'NOT')    throw new Exception(_('PS2PDF non installé'));
+                if (PDF2PS == 'NOT')    throw new Exception(_('PDF2PS non installé'));
             }
         } catch (Exception $ex) 
         {