diff --git a/src/layer/Popup.js b/src/layer/Popup.js
index 94e486cc..f991d9f1 100644
--- a/src/layer/Popup.js
+++ b/src/layer/Popup.js
@@ -131,6 +131,10 @@ L.Popup = L.Layer.extend({
 		}
 		return events;
 	},
+	
+	isOpen: function () {
+		return !!this._map && this._map.hasLayer(this);
+	},
 
 	_close: function () {
 		if (this._map) {