diff --git a/Definitions/toastr-1.0.d.ts b/Definitions/toastr-1.0.d.ts
index 772970218..fe2253e61 100644
--- a/Definitions/toastr-1.0.d.ts
+++ b/Definitions/toastr-1.0.d.ts
@@ -27,10 +27,11 @@ interface ToastOptions {
 interface Toastr {
     options: ToastOptions;
 
-    info(message: string, title?: string);
-    warning(message: string, title?: string);
-    success(message: string, title?: string);
-    error(message: string, title?: string);
+    clear(): void;
+    info(message: string, title?: string): void;
+    warning(message: string, title?: string): void;
+    success(message: string, title?: string): void;
+    error(message: string, title?: string): void;
 }
 
 declare var toastr: Toastr;
\ No newline at end of file