diff --git a/python/paddle/trainer_config_helpers/tests/layers_test_config.py b/python/paddle/trainer_config_helpers/tests/layers_test_config.py
index d479fb263fb66e67a56d23d9d4c1e21ca9052699..763993231f72f5e53e0d89044e68e8774db5ba36 100644
--- a/python/paddle/trainer_config_helpers/tests/layers_test_config.py
+++ b/python/paddle/trainer_config_helpers/tests/layers_test_config.py
@@ -41,7 +41,7 @@ tmp = fc_layer(input=x1,
 ctc = ctc_layer(input=tmp,
                 label=y,
                 size=num_classes + 1)
-ctc_eval = ctc_error_evaluator(input=ctc, label=y)
+ctc_eval = ctc_error_evaluator(input=tmp, label=y)
 
 settings(
     batch_size=10,