diff --git a/tools/nni_cmd/config_utils.py b/tools/nni_cmd/config_utils.py
index 1b7cbc1662..8cc1dc8ada 100644
--- a/tools/nni_cmd/config_utils.py
+++ b/tools/nni_cmd/config_utils.py
@@ -76,7 +76,7 @@ def update_experiment(self, expId, key, value):
 
     def remove_experiment(self, expId):
         '''remove an experiment by id'''
-        if id in self.experiments:
+        if expId in self.experiments:
             self.experiments.pop(expId)
         self.write_file()