diff --git a/phpBB/includes/functions_user.php b/phpBB/includes/functions_user.php
index 271542efdd..f58e19ddbe 100644
--- a/phpBB/includes/functions_user.php
+++ b/phpBB/includes/functions_user.php
@@ -2348,7 +2348,7 @@ function avatar_process_user(&$error, $custom_userdata = false)
 		}
 		else
 		{
-			list($sql_ary['user_avatar_width'], $sql_ary['user_avatar_height']) = getimagesize($phpbb_root_path . $config['avatar_gallery_path'] . '/' . $category . '/' . $sql_ary['user_avatar']);
+			list($sql_ary['user_avatar_width'], $sql_ary['user_avatar_height']) = getimagesize($phpbb_root_path . $config['avatar_gallery_path'] . '/' . $category . '/' . urldecode($sql_ary['user_avatar']));
 			$sql_ary['user_avatar'] = $category . '/' . $sql_ary['user_avatar'];
 		}
 	}