diff --git a/lib/impression/__init__.py b/lib/impression/__init__.py
index 0b46b87f..f16a52c9 100644
--- a/lib/impression/__init__.py
+++ b/lib/impression/__init__.py
@@ -103,7 +103,7 @@ LPR_OPTIONS = {
     TROIS_AGRAPHE: ' -o StapleLocation=3parallel',
     STITCHING: ' -o StapleLocation=Stitching',
     
-    PAPIER_A4: '-o InputSlot=Tray4 -o pdf-paper=571x817  -o PageSize=A4',
+    PAPIER_A4: ' -o InputSlot=Tray4 -o pdf-paper=571x817  -o PageSize=A4',
     PAPIER_A4_TRANSPARENT: ' -o PageSize=A4 -o InputSlot=Tray1 -o Media=Transparency',
     PAPIER_A3: ' -o pdf-expand -o pdf-paper=825x1166 -o InputSlot=Tray3 -o HPPaperPolicy=A3 -o PageSize=A3',