diff --git a/src/map/Map.js b/src/map/Map.js
index 99c1214d..bf67171e 100644
--- a/src/map/Map.js
+++ b/src/map/Map.js
@@ -295,7 +295,7 @@ export var Map = Evented.extend({
 		return this.setView(center, this._zoom, {pan: options});
 	},
 
-	// @method panBy(offset: Point): this
+	// @method panBy(offset: Point, options?: Pan options): this
 	// Pans the map by a given number of pixels (animated).
 	panBy: function (offset, options) {
 		offset = toPoint(offset).round();