diff --git a/types/oracledb/index.d.ts b/types/oracledb/index.d.ts
index c2fa4cb95a70e9..7c31d1acc55ffa 100644
--- a/types/oracledb/index.d.ts
+++ b/types/oracledb/index.d.ts
@@ -658,7 +658,7 @@ declare namespace OracleDB {
      *
      * For non-CLOB types, the conversion to string is handled by Oracle client libraries and is often referred to as defining the fetch type.
      */
-    let fetchAsString: Array<typeof DATE | typeof NUMBER | typeof BUFFER | typeof CLOB>;
+    let fetchAsString: Array<typeof DATE | typeof NUMBER | typeof BUFFER | typeof CLOB | typeof NCLOB>;
     /**
      * Converter can be used with fetch type handlers to change the returned data.
      * If the value returned by the fetch type handler function is undefined then no conversion takes place.
diff --git a/types/oracledb/oracledb-tests.ts b/types/oracledb/oracledb-tests.ts
index a84d75544dd064..60dc9f3622c464 100644
--- a/types/oracledb/oracledb-tests.ts
+++ b/types/oracledb/oracledb-tests.ts
@@ -720,7 +720,7 @@ export const fetchAsBufferTests = (): void => {
 };
 
 export const fetchAsStringTests = (): void => {
-    defaultOracledb.fetchAsString = [oracledb.DATE, oracledb.NUMBER, oracledb.BUFFER, oracledb.CLOB];
+    defaultOracledb.fetchAsString = [oracledb.DATE, oracledb.NUMBER, oracledb.BUFFER, oracledb.CLOB, oracledb.NCLOB];
     // @ts-expect-error
     defaultOracledb.fetchAsString = [{}];
     // @ts-expect-error