diff --git a/types/debug/index.d.ts b/types/debug/index.d.ts
index a03d5cd988..e8cfac264b 100644
--- a/types/debug/index.d.ts
+++ b/types/debug/index.d.ts
@@ -6,7 +6,7 @@
 //                 Brasten Sager <https://github.com/brasten>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-declare var debug: debug.IDebug & {debug:debug.IDebug, default:debug.IDebug};
+declare var debug: debug.IDebug & {debug: debug.IDebug, default: debug.IDebug};
 
 export = debug;
 export as namespace debug;