diff --git a/python/triton/compiler.py b/python/triton/compiler.py
index 5bdeb4347..3296883b1 100644
--- a/python/triton/compiler.py
+++ b/python/triton/compiler.py
@@ -826,7 +826,7 @@ def make_triton_ir(fn, signature, specialization, constants):
     gscope = fn.__globals__.copy()
     function_name = '_'.join([fn.__name__, kernel_suffix(signature.values(), specialization)])
     tys = list(signature.values())
-    new_constants = {k: True if tys[k] == "i1" else 1 for k in specialization.equal_to_1}
+    new_constants = {k: True if k in tys and tys[k] == "i1" else 1 for k in specialization.equal_to_1}
     new_attrs = {k: ("multiple_of", 16) for k in specialization.divisible_by_16}
     all_constants = constants.copy()
     all_constants.update(new_constants)
diff --git a/python/triton/runtime/jit.py b/python/triton/runtime/jit.py
index 4e9e58b06..3cf9f836e 100644
--- a/python/triton/runtime/jit.py
+++ b/python/triton/runtime/jit.py
@@ -259,12 +259,12 @@ def {self.fn.__name__}({', '.join(self.arg_names)}, grid, num_warps=4, num_stage
     except KeyError:
       # build dict of constant values
       args = [{args}]
-      configs = self._get_config(*args),
+      all_args = {', '.join([f'{arg}' for arg in self.arg_names])},
+      configs = self._get_config(*all_args),
       constants = self._make_constants(constexpr_key)
-      constants.update({{i: None for i, arg in enumerate(args) if arg is None}})
+      constants.update({{i: None for i, arg in enumerate(all_args) if arg is None}})
       constants.update({{i: 1 for i in configs[0].equal_to_1}})
       # build kernel signature -- doesn't include specialized arguments
-      all_args = {', '.join([f'{arg}' for arg in self.arg_names])},
       signature = {{ i: self._type_of(_key_of(arg)) for i, arg in enumerate(all_args) if i not in self.constexprs }}
       # build stub signature -- includes arguments that are specialized
       for i, arg in constants.items():