diff --git a/notebooks/samples/Cognitive Services for Big Data.ipynb b/notebooks/samples/Cognitive Services for Big Data.ipynb
index babef975b8..0765281b75 100644
--- a/notebooks/samples/Cognitive Services for Big Data.ipynb	
+++ b/notebooks/samples/Cognitive Services for Big Data.ipynb	
@@ -54,7 +54,7 @@
     "# A Bing Search v7 subscription key\n",
     "bing_search_key = os.environ[\"BING_IMAGE_SEARCH_KEY\"]\n",
     "# An Anomaly Dectector subscription key\n",
-    "anomaly_key = os.environ[\"ANOMALY_DETECTION_KEY\"]\n",
+    "anomaly_key = os.environ[\"ANOMALY_API_KEY\"]\n",
     "\n",
     "# Validate the key\n",
     "assert service_key != \"ADD_YOUR_SUBSCRIPION_KEY\""