diff --git a/python/triton/code_gen.py b/python/triton/code_gen.py
index cc0a103c9..1e514d3e2 100644
--- a/python/triton/code_gen.py
+++ b/python/triton/code_gen.py
@@ -700,6 +700,8 @@ class Kernel:
             return 'B'
         if isinstance(obj, str):
             return 'str'
+        if isinstance(obj, JITFunction):
+            return ''
         assert False