diff --git a/skqulacs/qkrr/qkrr.py b/skqulacs/qkrr/qkrr.py
index d57a816..fda27c6 100644
--- a/skqulacs/qkrr/qkrr.py
+++ b/skqulacs/qkrr/qkrr.py
@@ -80,5 +80,5 @@ def predict(self, xs: NDArray[np.float_]) -> NDArray[np.float_]:
             x_qc = self.circuit.run(xs[i])
             for j in range(len(self.data_states)):
                 kar[i][j] = abs(inner_product(x_qc, self.data_states[j])) ** 2
-        predicted: NDArray[np.float_] = self.krr.predict(kar)
+        predicted: NDArray[np.float_] = self.kernel_ridge_tuned.predict(kar)
         return predicted