diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 50eb3bc8c9..ba7e7006fe 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -75,7 +75,9 @@ OpenLayers.Map = OpenLayers.Class({
      *     The *layer* property will be a reference to the changed layer. The
      *     *property* property will be a key to the changed property (name,
      *     order, opacity, params, visibility or attribution).
-     * movestart - triggered after the start of a drag, pan, or zoom
+     * movestart - triggered after the start of a drag, pan, or zoom. The event
+     *     object may include a *zoomChanged* property that tells whether the
+     *     zoom has changed.
      * move - triggered after each drag, pan, or zoom
      * moveend - triggered after a drag, pan, or zoom completes
      * zoomend - triggered after a zoom completes
@@ -1908,7 +1910,9 @@ OpenLayers.Map = OpenLayers.Class({
 
         // if neither center nor zoom will change, no need to do anything
         if (zoomChanged || centerChanged || dragging) {
-            dragging || this.events.triggerEvent("movestart");
+            dragging || this.events.triggerEvent("movestart", {
+                zoomChanged: zoomChanged
+            });
 
             if (centerChanged) {
                 if (!zoomChanged && this.center) { 
diff --git a/tests/Map.html b/tests/Map.html
index ffa5234b61..b072585a2b 100644
--- a/tests/Map.html
+++ b/tests/Map.html
@@ -977,7 +977,7 @@
     }
 
     function test_Map_moveTo(t) {
-        t.plan(8);
+        t.plan(12);
 
         map = new OpenLayers.Map('map');
         var baseLayer = new OpenLayers.Layer.WMS("Test Layer", 
@@ -992,10 +992,15 @@
                 property: event.property
             });
         });
-        baseLayer.events.on({
+        map.events.on({
             move: function() {
                 t.ok(true, "move listener called");
             },
+            movestart: function(e) {
+                t.eq(e.zoomChanged, true, "movestart listener called with expected value");
+            }
+        });
+        baseLayer.events.on({
             moveend: function(e) {
                 t.eq(e.zoomChanged, true, "moveend listener called with expected value");
             }