diff --git a/apisix/plugins/ai-content-moderation.lua b/apisix/plugins/ai-content-moderation.lua
index 00d7069e2c0b..18141fa74cd3 100644
--- a/apisix/plugins/ai-content-moderation.lua
+++ b/apisix/plugins/ai-content-moderation.lua
@@ -23,6 +23,8 @@ local aws_instance = aws()
 local next = next
 local pairs = pairs
 local unpack = unpack
+local type = type
+local ipairs = ipairs
 
 local aws_comprehend_schema = {
     type = "object",
diff --git a/apisix/plugins/ai/openai.lua b/apisix/plugins/ai/openai.lua
index 42683fe6a604..203debb7e6d1 100644
--- a/apisix/plugins/ai/openai.lua
+++ b/apisix/plugins/ai/openai.lua
@@ -15,6 +15,7 @@
 -- limitations under the License.
 --
 local core = require("apisix.core")
+local ipairs = ipairs
 
 local _M = {}