diff --git a/0.3/functions.php b/0.3/functions.php
index 0be8f2e..ad2bcb9 100755
--- a/0.3/functions.php
+++ b/0.3/functions.php
@@ -30,6 +30,10 @@ function urlToFolder($url) {
     return sha1(NoProtocolSiteURL($url));
 }
 
+function urlToFolderWithTrailingSlash($url) {
+    return sha1(NoProtocolSiteURL($url).'/');
+}
+
 function escape($str) {
     return htmlspecialchars($str, ENT_COMPAT, 'UTF-8', false);
 }
@@ -47,6 +51,12 @@ function createAutoblog($type, $sitename, $siteurl, $rssurl, $error = array()) {
 		$error[] = 'Erreur: l\'autoblog <a href="./'.$foldername.'/">'. $sitename .'</a> existe déjà.'; 
 		return $error;
 	}
+
+	$foldername = urlToFolderWithTrailingSlash($siteurl);
+	if(file_exists($foldername)) { 
+		$error[] = 'Erreur: l\'autoblog <a href="./'.$foldername.'/">'. $sitename .'</a> existe déjà.'; 
+		return $error;
+	}
 	
 	if ( mkdir('./'. $foldername, 0755, false) ) {
         $fp = fopen('./'. $foldername .'/index.php', 'w+');
@@ -97,4 +107,4 @@ function updateType($siteurl) {
     else
         return array('type' => 'generic', 'name' => '');
 }
-?>
\ No newline at end of file
+?>