diff --git a/mimic-iii/buildmimic/postgres/postgres_add_comments.sql b/mimic-iii/buildmimic/postgres/postgres_add_comments.sql
index 60f070a4b..86a58c6b2 100644
--- a/mimic-iii/buildmimic/postgres/postgres_add_comments.sql
+++ b/mimic-iii/buildmimic/postgres/postgres_add_comments.sql
@@ -451,7 +451,7 @@ COMMENT ON COLUMN ICUSTAYS.SUBJECT_ID is
 COMMENT ON COLUMN ICUSTAYS.HADM_ID is
    'Foreign key. Identifies the hospital stay.';
 COMMENT ON COLUMN ICUSTAYS.ICUSTAY_ID is
-   'Primary key. Identifies the ICU stay.';
+   'Identifies the ICU stay.';
 COMMENT ON COLUMN ICUSTAYS.DBSOURCE is
    'Source database of the item.';
 COMMENT ON COLUMN ICUSTAYS.INTIME is