diff --git a/impression/class_impression.py b/impression/class_impression.py
index 688e20fd..211804ce 100755
--- a/impression/class_impression.py
+++ b/impression/class_impression.py
@@ -192,7 +192,7 @@ class fichier_impression:
         if self.taille == 'A4':
             options += ' -o pdf-paper=571x817  -o PageSize=A4'
         else:                          
-            options += ' -o pdf-paper=825x1166 -o InputSlot=Tray3 -o HPPaperPolicy=A3 -o PageSize=A3'
+            options += ' -o pdf-expand -o pdf-paper=825x1166 -o InputSlot=Tray3 -o HPPaperPolicy=A3 -o PageSize=A3'
                         
         if self.portrait:
             if self.recto_verso: