diff --git a/src/emqx_json.erl b/src/emqx_json.erl
index 665e7ad57..db35835ce 100644
--- a/src/emqx_json.erl
+++ b/src/emqx_json.erl
@@ -24,12 +24,22 @@
         , safe_encode/2
         ]).
 
+-compile({inline,
+          [ encode/1
+          , encode/2
+          ]}).
+
 -export([ decode/1
         , decode/2
         , safe_decode/1
         , safe_decode/2
         ]).
 
+-compile({inline,
+          [ decode/1
+          , decode/2
+          ]}).
+
 -spec(encode(jsx:json_term()) -> jsx:json_text()).
 encode(Term) ->
     jsx:encode(Term).