diff --git a/azure-mobile-services-client/AzureMobileServicesClient.d.ts b/azure-mobile-services-client/AzureMobileServicesClient.d.ts
index 3b2b8fc167..2aec111143 100644
--- a/azure-mobile-services-client/AzureMobileServicesClient.d.ts
+++ b/azure-mobile-services-client/AzureMobileServicesClient.d.ts
@@ -42,21 +42,21 @@ declare module Microsoft.WindowsAzure {
         getTableName(): string;
         getMobileServiceClient(): MobileServiceClient;
 
-        insert(istance: any, paramsQS: Object, callback: (error: any, retInserted: any) => any): void;
-        insert(istance: any, paramsQS: Object): asyncPromise;
-        insert(istance: any): asyncPromise;
+        insert(instance: any, paramsQS: Object, callback: (error: any, retInserted: any) => any): void;
+        insert(instance: any, paramsQS: Object): asyncPromise;
+        insert(instance: any): asyncPromise;
 
-        update(istance: any, paramsQS: Object, callback: (error: any, retUpdated: any) => any): void;
-        update(istance: any, paramsQS: Object): asyncPromise;
-        update(istance: any): asyncPromise;
+        update(instance: any, paramsQS: Object, callback: (error: any, retUpdated: any) => any): void;
+        update(instance: any, paramsQS: Object): asyncPromise;
+        update(instance: any): asyncPromise;
 
         lookup(id: number, paramsQS: Object, callback: (error: any, retValue: any) => any): void;
         lookup(id: number, paramsQS: Object): asyncPromise;
         lookup(id: number): asyncPromise;
 
-        del(istance: any, paramsQS: Object, callback: (error?: any) => void ): void;
-        del(istance: any, paramsQS: Object): asyncPromise;
-        del(istance: any): asyncPromise;
+        del(instance: any, paramsQS: Object, callback: (error?: any) => void ): void;
+        del(instance: any, paramsQS: Object): asyncPromise;
+        del(instance: any): asyncPromise;
 
 
         read(query: IQuery, paramsQS: Object, callback: (error: any, retValues: any) => any): void;