diff --git a/nselib/stdnse.lua b/nselib/stdnse.lua
index 3cd87687b..df8bd6426 100644
--- a/nselib/stdnse.lua
+++ b/nselib/stdnse.lua
@@ -3,6 +3,7 @@
 
 local assert = assert;
 local tonumber = tonumber;
+local error = error;
 local concat = table.concat;
 local nmap = require"nmap";
 local max = math.max