diff --git a/spec/suites/layer/tile/GridLayerSpec.js b/spec/suites/layer/tile/GridLayerSpec.js
index 62f1ba65..c8e8e243 100644
--- a/spec/suites/layer/tile/GridLayerSpec.js
+++ b/spec/suites/layer/tile/GridLayerSpec.js
@@ -1008,4 +1008,13 @@ describe('GridLayer', function () {
 			}).to.throwError('Attempted to load an infinite number of tiles');
 		});
 	});
+
+	it("doesn't call map's getZoomScale method with null after _invalidateAll method was called", function () {
+		map.setView([0, 0], 0);
+		var grid = L.gridLayer().addTo(map);
+		var wrapped = sinon.spy(map, 'getZoomScale');
+		grid._invalidateAll();
+		grid.redraw();
+		expect(wrapped.neverCalledWith(sinon.match.any, null)).to.be(true);
+	});
 });
diff --git a/src/layer/tile/GridLayer.js b/src/layer/tile/GridLayer.js
index 86370e1a..57168205 100755
--- a/src/layer/tile/GridLayer.js
+++ b/src/layer/tile/GridLayer.js
@@ -172,7 +172,7 @@ export var GridLayer = Layer.extend({
 		DomUtil.remove(this._container);
 		map._removeZoomLimit(this);
 		this._container = null;
-		this._tileZoom = null;
+		this._tileZoom = undefined;
 	},
 
 	// @method bringToFront: this
@@ -466,7 +466,7 @@ export var GridLayer = Layer.extend({
 		}
 		this._removeAllTiles();
 
-		this._tileZoom = null;
+		this._tileZoom = undefined;
 	},
 
 	_retainParent: function (x, y, z, minZoom) {