diff --git a/lib/onoffsim/index.js b/lib/onoffsim/index.js
index 7fac81f..88b8c70 100644
--- a/lib/onoffsim/index.js
+++ b/lib/onoffsim/index.js
@@ -25,6 +25,8 @@ const onoffsim = {
 			},
 			watch : function (cb) {
 				this.watchFunc = cb
+			},
+			unexport : function () {
 			}
 		}
 	}