diff --git a/src/ol/extent.js b/src/ol/extent.js
index 9627ea29a1..078e8397fc 100644
--- a/src/ol/extent.js
+++ b/src/ol/extent.js
@@ -337,6 +337,19 @@ ol.extent.toString = function(extent) {
 };
 
 
+/**
+ * @param {ol.Extent} extent1 Extent 1.
+ * @param {ol.Extent} extent2 Extent 2.
+ * @return {boolean} Touches.
+ */
+ol.extent.touches = function(extent1, extent2) {
+  var intersects = ol.extent.intersects(extent1, extent2);
+  return intersects &&
+      (extent1[0] == extent2[2] || extent1[2] == extent2[0] ||
+       extent1[1] == extent2[3] || extent1[3] == extent2[1]);
+};
+
+
 /**
  * @param {ol.Extent} extent Extent.
  * @param {ol.TransformFunction} transformFn Transform function.
diff --git a/src/ol/source/tilewmssource.js b/src/ol/source/tilewmssource.js
index 7faa7244b7..6f582b039c 100644
--- a/src/ol/source/tilewmssource.js
+++ b/src/ol/source/tilewmssource.js
@@ -84,7 +84,8 @@ ol.source.TileWMS = function(options) {
       tileExtent = tileGrid.getTileCoordExtent(
           new ol.TileCoord(tileCoord.z, x, tileCoord.y));
     }
-    if (!goog.isNull(extent) && !ol.extent.intersects(tileExtent, extent)) {
+    if (!goog.isNull(extent) && (!ol.extent.intersects(tileExtent, extent) ||
+        ol.extent.touches(tileExtent, extent))) {
       return null;
     }
     return new ol.TileCoord(tileCoord.z, x, tileCoord.y);
diff --git a/src/ol/source/wmtssource.js b/src/ol/source/wmtssource.js
index d0ddb75e40..47a64fa2f5 100644
--- a/src/ol/source/wmtssource.js
+++ b/src/ol/source/wmtssource.js
@@ -165,7 +165,8 @@ ol.source.WMTS = function(options) {
           tmpTileCoord.y = tileCoord.y;
           tileExtent = tileGrid.getTileCoordExtent(tmpTileCoord, tmpExtent);
         }
-        if (!ol.extent.intersects(tileExtent, extent)) {
+        if (!ol.extent.intersects(tileExtent, extent) ||
+            ol.extent.touches(tileExtent, extent)) {
           return null;
         }
         return new ol.TileCoord(tileCoord.z, x, y);
diff --git a/test/spec/ol/extent.test.js b/test/spec/ol/extent.test.js
index c4a9a1dbeb..2aaba7c351 100644
--- a/test/spec/ol/extent.test.js
+++ b/test/spec/ol/extent.test.js
@@ -122,7 +122,7 @@ describe('ol.extent', function() {
     });
   });
 
-  describe('intersect', function() {
+  describe('intersects', function() {
 
     it('returns the expected value', function() {
       var intersects = ol.extent.intersects;
@@ -157,6 +157,23 @@ describe('ol.extent', function() {
     });
   });
 
+  describe('touches', function() {
+
+    it('returns the expected value', function() {
+      var touches = ol.extent.touches;
+      var extent = [50, 50, 100, 100];
+      expect(touches(extent, [20, 20, 80, 80])).to.be(false);
+      expect(touches(extent, [20, 20, 50, 80])).to.be(true);
+      expect(touches(extent, [20, 20, 50, 40])).to.be(false);
+      expect(touches(extent, [100, 20, 140, 80])).to.be(true);
+      expect(touches(extent, [100, 20, 140, 40])).to.be(false);
+      expect(touches(extent, [20, 20, 80, 50])).to.be(true);
+      expect(touches(extent, [20, 20, 40, 50])).to.be(false);
+      expect(touches(extent, [20, 100, 80, 140])).to.be(true);
+      expect(touches(extent, [20, 100, 40, 140])).to.be(false);
+    });
+  });
+
   describe('normalize', function() {
     it('returns the expected coordinate', function() {
       var extent = [0, 1, 2, 3];