diff --git a/lualib/loader.lua b/lualib/loader.lua
index c18597e8..bf0b0577 100644
--- a/lualib/loader.lua
+++ b/lualib/loader.lua
@@ -25,8 +25,8 @@ if not main then
 end
 
 LUA_SERVICE = nil
-package.path , LUA_PATH = LUA_PATH
-package.cpath , LUA_CPATH = LUA_CPATH
+package.path , LUA_PATH = LUA_PATH, nil
+package.cpath , LUA_CPATH = LUA_CPATH, nil
 
 local service_path = string.match(pattern, "(.*/)[^/?]+$")
 
diff --git a/lualib/skynet/db/mysql.lua b/lualib/skynet/db/mysql.lua
index afa6e229..94b9b8f0 100644
--- a/lualib/skynet/db/mysql.lua
+++ b/lualib/skynet/db/mysql.lua
@@ -820,7 +820,7 @@ end
 
 local function _prepare_resp(self, sql)
     return function(sock)
-        return read_prepare_result(self, sock, sql)
+        return read_prepare_result(self, sock)
     end
 end