diff --git a/phantomcss/index.d.ts b/phantomcss/index.d.ts
index 48829a1bbe..9f57e26c46 100644
--- a/phantomcss/index.d.ts
+++ b/phantomcss/index.d.ts
@@ -138,7 +138,7 @@ declare namespace PhantomCSS {
         prefixCount?: boolean;
 
         hideElements?: string;
-        outputSettings?: Resemble.OutputSettings;
+        outputSettings?: resemble.OutputSettings;
     }
 
 }