diff --git a/typings/parts/blockly-interfaces.d.ts b/typings/parts/blockly-interfaces.d.ts
index 760f97fcb..31fa80fbb 100644
--- a/typings/parts/blockly-interfaces.d.ts
+++ b/typings/parts/blockly-interfaces.d.ts
@@ -36,6 +36,7 @@ declare module Blockly {
       minScale?: number;
       scaleSpeed?: number;
     };
+    renderer?: string;
   }
 
   interface BlocklyThemeOptions {