diff --git a/d3/d3.d.ts b/d3/d3.d.ts
index 07409eeee..67dca5fec 100644
--- a/d3/d3.d.ts
+++ b/d3/d3.d.ts
@@ -2585,7 +2585,7 @@ declare module D3 {
     }
 
     // Behaviour
-    export module Behaviour {
+    export module Behavior {
         export interface Behavior{
             /**
             * Constructs a new drag behaviour