diff --git a/cms/envs/aws.py b/cms/envs/aws.py
index dbade8bba5..a6d6e2f847 100644
--- a/cms/envs/aws.py
+++ b/cms/envs/aws.py
@@ -113,6 +113,7 @@ for feature, value in ENV_TOKENS.get('MITX_FEATURES', {}).items():
     MITX_FEATURES[feature] = value
 
 # If Segment.io key specified, load it and turn on Segment.io if the feature flag is set
+# Note that this is the Studio key. There is a separate key for the LMS.
 SEGMENT_IO_KEY = AUTH_TOKENS.get('SEGMENT_IO_KEY')
 if SEGMENT_IO_KEY:
     MITX_FEATURES['SEGMENT_IO'] = ENV_TOKENS.get('SEGMENT_IO', False)
diff --git a/cms/envs/dev.py b/cms/envs/dev.py
index 9de42656c6..e254869bd6 100644
--- a/cms/envs/dev.py
+++ b/cms/envs/dev.py
@@ -165,7 +165,8 @@ MITX_FEATURES['ENABLE_SERVICE_STATUS'] = True
 
 ############################# SEGMENT-IO ##################################
 
-# If there's an environment variable set, grab it and turn on segment io
+# If there's an environment variable set, grab it and turn on Segment.io
+# Note that this is the Studio key. There is a separate key for the LMS.
 SEGMENT_IO_KEY = os.environ.get('SEGMENT_IO_KEY')
 if SEGMENT_IO_KEY:
     MITX_FEATURES['SEGMENT_IO'] = True
diff --git a/lms/envs/aws.py b/lms/envs/aws.py
index b9d3f58e8f..c8c49c2b1e 100644
--- a/lms/envs/aws.py
+++ b/lms/envs/aws.py
@@ -179,7 +179,7 @@ with open(ENV_ROOT / CONFIG_PREFIX + "auth.json") as auth_file:
     AUTH_TOKENS = json.load(auth_file)
 
 ############### Mixed Related(Secure/Not-Secure) Items ##########
-# If segment.io key specified, load it and turn on segment IO if the feature flag is set
+# If Segment.io key specified, load it and enable Segment.io if the feature flag is set
 SEGMENT_IO_LMS_KEY = AUTH_TOKENS.get('SEGMENT_IO_LMS_KEY')
 if SEGMENT_IO_LMS_KEY:
     MITX_FEATURES['SEGMENT_IO_LMS'] = ENV_TOKENS.get('SEGMENT_IO_LMS', False)