diff --git a/webcola/webcola.d.ts b/webcola/webcola.d.ts
index 177039b139..ba17d14095 100644
--- a/webcola/webcola.d.ts
+++ b/webcola/webcola.d.ts
@@ -37,11 +37,20 @@ declare module WebCola{
         right: number;
     }
 
-    interface FlowLayout{
+    interface FlowLayout {
         axis: string;
         minSeparation?: number;
     }
 
+    interface Node {
+        height: number;
+        id: string;
+        size: number;
+        width: number;
+        x: number;
+        y: number;
+    }
+
     interface Options {
         avoidOverlaps?: boolean;
         convergenceThreshold?: number;