diff --git a/htdocs/website/class/website.class.php b/htdocs/website/class/website.class.php
index 9337c438d1e..36e1f3d417f 100644
--- a/htdocs/website/class/website.class.php
+++ b/htdocs/website/class/website.class.php
@@ -833,9 +833,15 @@ class Website extends CommonObject
 		$arrayreplacementincss['file=js/'.$website->ref.'/'] = "file=js/__WEBSITE_KEY__/";
 		$arrayreplacementincss['medias/image/'.$website->ref.'/'] = "medias/image/__WEBSITE_KEY__/";
 		$arrayreplacementincss['medias/js/'.$website->ref.'/'] = "medias/js/__WEBSITE_KEY__/";
-		$arrayreplacementincss['file=logos%2Fthumbs%2F'.$mysoc->logo_small] = "file=logos%2Fthumbs%2F__LOGO_SMALL_KEY__";
-		$arrayreplacementincss['file=logos%2Fthumbs%2F'.$mysoc->logo_mini] = "file=logos%2Fthumbs%2F__LOGO_MINI_KEY__";
-		$arrayreplacementincss['file=logos%2Fthumbs%2F'.$mysoc->logo] = "file=logos%2Fthumbs%2F__LOGO_KEY__";
+		if ($mysoc->logo_small) {
+		  $arrayreplacementincss['file=logos%2Fthumbs%2F'.$mysoc->logo_small] = "file=logos%2Fthumbs%2F__LOGO_SMALL_KEY__";
+		}
+		if ($mysoc->logo_mini) {
+		  $arrayreplacementincss['file=logos%2Fthumbs%2F'.$mysoc->logo_mini] = "file=logos%2Fthumbs%2F__LOGO_MINI_KEY__";
+		}
+		if ($mysoc->logo) {
+		    $arrayreplacementincss['file=logos%2Fthumbs%2F'.$mysoc->logo] = "file=logos%2Fthumbs%2F__LOGO_KEY__";
+		}
 
 		$srcdir = $conf->website->dir_output.'/'.$website->ref;
 		$destdir = $conf->website->dir_temp.'/'.$website->ref.'/containers';