diff --git a/types/coinbase/coinbase-tests.ts b/types/coinbase/coinbase-tests.ts
index e7d53012d7..65ec9693bd 100644
--- a/types/coinbase/coinbase-tests.ts
+++ b/types/coinbase/coinbase-tests.ts
@@ -33,7 +33,7 @@ client.getAccount("abcdef", (error: Error, account: coinbase.Account): void => {
 
     account.getSell("abcdef", (error: Error, deposit: coinbase.Sell): void => undefined);
 
-    account.getSells((error: Error, deposit: coinbase.Sell[]): void => undefined);
+    account.getSells(null, (error: Error, deposit: coinbase.Sell[]): void => undefined);
 
     account.getTransaction("abcdef", (error: Error, deposit: coinbase.Transaction): void => undefined);
 
diff --git a/types/coinbase/index.d.ts b/types/coinbase/index.d.ts
index 4580179195..1e94f04295 100644
--- a/types/coinbase/index.d.ts
+++ b/types/coinbase/index.d.ts
@@ -678,7 +678,7 @@ export class Account implements Resource {
      * Lists sells for an account.
      * Scope: wallet:sells:read
      */
-    getSells(cb: (error: Error, result: Sell[]) => void): void;
+    getSells(opts: null, cb: (error: Error, result: Sell[]) => void): void;
 
     /**
      * Show an individual sell.