diff --git a/tilelang/language/eager/ast.py b/tilelang/language/eager/ast.py
index 378306128..c64ddc421 100644
--- a/tilelang/language/eager/ast.py
+++ b/tilelang/language/eager/ast.py
@@ -6,6 +6,7 @@
 from contextlib import AbstractContextManager
 from collections.abc import Iterable
 
+
 # Python 3.9 compatibility for ParamSpec
 try:
     from typing import ParamSpec
@@ -249,6 +250,14 @@ def override(self, name: str):
         return globals()[name]
 
 
+def _try_eval(node: ast.expr, nonlocals: dict[str, Any], globals: dict[str, Any]) -> Any:
+    try:
+        code = "lambda " + ",".join(nonlocals.keys()) + ": " + ast.unparse(node)
+        return eval(code, globals)(**nonlocals)
+    except Exception:
+        return _empty
+
+
 class DSLMutator(ast.NodeTransformer):
     def __init__(self, nonlocals: dict[str, Any], globals: dict[str, Any], filename: str):
         self.tmp_counter = 0
@@ -487,11 +496,7 @@ def visit_FunctionDef(self, node: ast.FunctionDef):
         )
 
     def _try_eval(self, node: ast.expr) -> Any:
-        try:
-            code = "lambda " + ",".join(self.nonlocals.keys()) + ": " + ast.unparse(node)
-            return eval(code, self.globals)(**self.nonlocals)
-        except Exception:
-            return _empty
+        return _try_eval(node, self.nonlocals, self.globals)
 
     def _parse_arg_annot(self, stmt: ast.stmt, arg_names: set[str]):
         if not isinstance(stmt, ast.AnnAssign):
@@ -607,6 +612,21 @@ class IRGenerator(Generic[_P, _T]):
     extra_type_hints: dict[str, Any] = field(default_factory=dict)
 
 
+def has_internal_prim_func(func: Callable[_P, _T]) -> bool:
+    tree = utils.get_ast(func)
+    nonlocals = utils.get_func_nonlocals(func)
+    for item in ast.walk(tree):
+        if isinstance(item, ast.FunctionDef):
+            decors = item.decorator_list
+            for decor in decors:
+                if isinstance(decor, ast.Attribute) and decor.attr == "prim_func":
+                    from tilelang.language.eager import prim_func
+
+                    if _try_eval(decor, nonlocals, func.__globals__) is prim_func:
+                        return True
+    return False
+
+
 def mutate(func: Callable[_P, _T]) -> IRGenerator[_P, _T]:
     """
     Transform a Python function into an IR (Intermediate Representation) generator.
diff --git a/tilelang/language/eager/builder.py b/tilelang/language/eager/builder.py
index 6b00a3426..33cc73903 100644
--- a/tilelang/language/eager/builder.py
+++ b/tilelang/language/eager/builder.py
@@ -10,7 +10,7 @@
 from tvm.ir.expr import Range
 from tvm.tir.stmt import BufferRegion
 from tvm.tir.stmt_functor import substitute
-from .ast import BaseBuilder, IRGenerator, eval_op, mutate
+from .ast import BaseBuilder, IRGenerator, eval_op, has_internal_prim_func, mutate
 from .utils import construct_strides
 from tilelang.utils import side_effect
 import tvm
@@ -1016,6 +1016,12 @@ def foo(A, B):
                 with T.Kernel(...): ...
                 # no return
         """
+        if has_internal_prim_func(self.orig_func):
+            return True
+        try:
+            inspect.signature(self.orig_func).bind(*args, **kwargs)
+        except TypeError:
+            return False
         try:
             prim_func = self.orig_func(*args, **kwargs)
             # lazy jit must return PrimFunc
@@ -1024,7 +1030,7 @@ def foo(A, B):
                 self.p1_cache[p1_key] = TirTemplate.from_lazy_style(prim_func)
                 return True
             return False
-        except (JITNoBuilderError, EagerJITBuildError, TypeError):
+        except (JITNoBuilderError, EagerJITBuildError):
             # In eager mode, we construct AST directly without prim_func,
             # so there's no Builder available when the function is called.
             # When eager-only features like T.const() or T.Kernel() are used,