diff --git a/libs/lucid/luasrc/lucid/tcpserver.lua b/libs/lucid/luasrc/lucid/tcpserver.lua
index 2d82246dff..477152ef16 100644
--- a/libs/lucid/luasrc/lucid/tcpserver.lua
+++ b/libs/lucid/luasrc/lucid/tcpserver.lua
@@ -176,7 +176,7 @@ end
 
 function prepare_tls(tlskey)
 	local tls
-	if tlskey and cursor:get(UCINAME, tlskey) then
+	if nixio.tls and tlskey and cursor:get(UCINAME, tlskey) then
 		tls = nixio.tls("server")
 		
 		local make = cursor:get(UCINAME, tlskey, "generate") == "1"