diff --git a/ExtractScripts/N3C_extract_omop_postgres.sql b/ExtractScripts/N3C_extract_omop_postgres.sql
index 4097dd9..74bbb44 100644
--- a/ExtractScripts/N3C_extract_omop_postgres.sql
+++ b/ExtractScripts/N3C_extract_omop_postgres.sql
@@ -177,8 +177,8 @@ HAVING COUNT(*) > 1;
 SELECT
    p.PERSON_ID,
    GENDER_CONCEPT_ID,
-   COALESCE(YEAR_OF_BIRTH,DATEPART(year, birth_datetime )) as YEAR_OF_BIRTH,
-   COALESCE(MONTH_OF_BIRTH,DATEPART(month, birth_datetime)) as MONTH_OF_BIRTH,
+   COALESCE(YEAR_OF_BIRTH,DATE_PART('year', birth_datetime )) as YEAR_OF_BIRTH,
+   COALESCE(MONTH_OF_BIRTH,DATE_PART('month', birth_datetime)) as MONTH_OF_BIRTH,
    RACE_CONCEPT_ID,
    ETHNICITY_CONCEPT_ID,
    LOCATION_ID,