diff --git a/src/includes/class/class.LSurl.php b/src/includes/class/class.LSurl.php
index 7ba64e82..207d7ee4 100644
--- a/src/includes/class/class.LSurl.php
+++ b/src/includes/class/class.LSurl.php
@@ -192,13 +192,24 @@ class LSurl extends LSlog_staticLoggerClass {
     $public_root_url = LSconfig :: get('public_root_url', '/', 'string');
 
     if ($absolute && $public_root_url[0] == '/') {
-      self :: log_debug("LSurl :: public_root_url(absolute=true): configured public root URL is relative ($public_root_url) => try to detect it from current request infos.");
-      $public_root_url = 'http'.(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'?'s':'').'://'.$_SERVER['HTTP_HOST'].$public_root_url;
-      self :: log_debug("LSurl :: public_root_url(absolute=true): detected public absolute root URL: $public_root_url");
+      self :: log_debug(
+        "LSurl :: public_root_url(absolute=true): configured public root URL is relative ".
+        "($public_root_url) => try to detect it from current request infos."
+      );
+      $public_root_url = sprintf(
+        "http%s://%s%s",
+        isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'?'s':'',
+        $_SERVER['HTTP_HOST'],
+        $public_root_url
+      );
+      self :: log_debug(
+        "LSurl :: public_root_url(absolute=true): detected public absolute root URL: ".
+        $public_root_url
+      );
     }
 
     if ($relative_url) {
-      if ($public_root_url[0] == '/') $public_root_url .= "/";
+      if ($public_root_url[-1] != '/') $public_root_url .= "/";
       return $public_root_url.$relative_url;
     }