diff --git a/scripts/ssh-hostkey.nse b/scripts/ssh-hostkey.nse
index a6ab2b021..6b1e9279b 100644
--- a/scripts/ssh-hostkey.nse
+++ b/scripts/ssh-hostkey.nse
@@ -289,7 +289,7 @@ local function portaction(host, port)
   key = ssh2.fetch_host_key( host, port, "ecdsa-sha2-nistp521" )
   if key then table.insert( keys, key ) end
 
-  if #keys < 0 then
+  if #keys == 0 then
     return nil
   end