diff --git a/nselib/dns.lua b/nselib/dns.lua
index e5fa3f236..7a0920a42 100644
--- a/nselib/dns.lua
+++ b/nselib/dns.lua
@@ -107,7 +107,7 @@ local function getAuthDns(rPkt)
       if #rPkt.answers == 0 then
          return false 
       else
-         if #rPkt.answers[1].dtype == types.CNAME then
+         if rPkt.answers[1].dtype == types.CNAME then
             return {cname = rPkt.answers[1].domain}
          end
       end