diff --git a/johnny-five/johnny-five.d.ts b/johnny-five/johnny-five.d.ts
index 9dd1477eb..e2c2c1c30 100644
--- a/johnny-five/johnny-five.d.ts
+++ b/johnny-five/johnny-five.d.ts
@@ -251,10 +251,12 @@ declare module "johnny-five" {
 
     export interface LCDI2COption extends LCDGeneralOption{
         controller: string;
+        backlight?: number;
     }
 
     export interface LCDParallelOption extends LCDGeneralOption{
         pins: Array<any>;
+        backlight?: number;
     }
 
     export class LCD{