diff --git a/doc/ChangeLog b/doc/ChangeLog
index a23a3e1440..7ae5691f76 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -51,6 +51,7 @@ Mantis ChangeLog
  * Fixed problem deleting bugnotes.
  * Fixed problem in core_API.php where constants were used before declaration
  * Fixed problem in core_user_API.php which caused an infinite redirect in some browsers (such as Mozilla).
+ * Fixed problem in manage_proj_update.php which gave a warning when editing projects with empty upload file paths.
  * Fixed problem with ambiguous column names in queries when using the text search or applying filters
  * Fixed problem with print_assign_to_option_list() not selecting the current user.
  * Fixed security hole in summary_graph_functions.php (Joao Gouveia: tharbad@kaotik.org)
diff --git a/manage_proj_update.php b/manage_proj_update.php
index 9385e41416..4f99765b61 100644
--- a/manage_proj_update.php
+++ b/manage_proj_update.php
@@ -16,7 +16,7 @@
 	}
 
 	# Make sure file path has trailing slash
-	if ( $f_file_path[strlen($f_file_path)-1] != '/' ) {
+	if ( $f_file_path && $f_file_path[strlen($f_file_path)-1] != '/' ) {
 		$f_file_path = $f_file_path.'/';
 	}