diff --git a/types/ibm_db/ibm_db-tests.ts b/types/ibm_db/ibm_db-tests.ts
index 93802c662f..cc896b8d05 100644
--- a/types/ibm_db/ibm_db-tests.ts
+++ b/types/ibm_db/ibm_db-tests.ts
@@ -10,3 +10,14 @@ ibmdb.open("DATABASE=<dbname>;HOSTNAME=<myhost>;UID=db2user;PWD=password;PORT=<d
     });
   });
 });
+
+/** imdb.ODBCStatement */
+const service = new ibmdb.ODBCStatement();
+service.executeSync();
+ service.executeSync(
+  ["test"]
+);
+ service._executeSync();
+ service._executeSync(
+  ["test"]
+);
diff --git a/types/ibm_db/index.d.ts b/types/ibm_db/index.d.ts
index 24699c195e..6ab64c8d60 100644
--- a/types/ibm_db/index.d.ts
+++ b/types/ibm_db/index.d.ts
@@ -150,7 +150,7 @@ export class ODBCStatement {
     // TODO: type of outparams is unknown
     _execute(cb: (err: Error, result: any[]) => void): void;
 
-    _executeSync(params: any[]): ODBCResult;
+    _executeSync(params?: any[]): ODBCResult;
 
     _executeDirect(sql: string, cb: (err: Error, result: any[]) => void): void;
 
@@ -170,7 +170,7 @@ export class ODBCStatement {
     execute(cb: (err: Error, result: any[], outparams: any) => void): void;
     execute(params: any[]): Promise<{result: any[], outparams: any}>;
 
-    executeSync(params: any[]): ODBCResult;
+    executeSync(params?: any[]): ODBCResult;
 
     executeDirect(sql: string, cb: (err: Error, result: any[]) => void): void;