diff --git a/intranet/modules/impression/static/impression.js b/intranet/modules/impression/static/impression.js
index a3e929d7..a6c74e20 100644
--- a/intranet/modules/impression/static/impression.js
+++ b/intranet/modules/impression/static/impression.js
@@ -166,17 +166,17 @@ Impression.settings.update = function () {
      } else {
 	this.setDisableField(this.theform.agrafage, false);
      }
-   if (this.papier == "A4tr")
+   if (this.papier == "A4tr" || this.papier == "A3")
      {
 	this.theform.disposition_recto.checked = true;
-	this.disableField(this.theform.disposition_recto);
 	this.disableField(this.theform.disposition_recto_verso);
+    this.disableField(this.theform.disposition_livret);
 	this.getValue(this.theform.disposition_recto);
      }
    else
      {
-	this.setDisableField(this.theform.disposition_recto, false);
 	this.setDisableField(this.theform.disposition_recto_verso, false);
+	this.setDisableField(this.theform.disposition_livret, false);
      }
 
    this.updatePreview();