diff --git a/js/id/core/history.js b/js/id/core/history.js
index 501f3646e..392c3db40 100644
--- a/js/id/core/history.js
+++ b/js/id/core/history.js
@@ -42,7 +42,7 @@ iD.History = function(context) {
 
         merge: function(entities) {
 
-            var base = tree.base(),
+            var base = tree.graph(),
                 newentities = Object.keys(entities).filter(function(i) {
                     return !base.entities.hasOwnProperty(i) && !base.entities[i];
                 });
diff --git a/js/id/core/tree.js b/js/id/core/tree.js
index 8c3635c32..d548ec8f3 100644
--- a/js/id/core/tree.js
+++ b/js/id/core/tree.js
@@ -5,7 +5,7 @@ iD.Tree = function(graph) {
         head = graph,
         queuedCreated = [],
         queuedModified = [],
-        x, y, dx, dy;
+        x, y, dx, dy, rebased;
 
     function extentRectangle(extent) {
             x = m * extent[0][0],
@@ -34,6 +34,7 @@ iD.Tree = function(graph) {
             for (var i = 0; i < entities.length; i++) {
                 insert(graph.entity(entities[i]), true);
             }
+            rebased = true;
             return tree;
         },
 
@@ -41,7 +42,7 @@ iD.Tree = function(graph) {
 
             head = g;
 
-            if (graph !== head) {
+            if (graph !== head || rebased) {
                 var diff = iD.Difference(graph, head),
                     modified = {};
 
@@ -70,13 +71,14 @@ iD.Tree = function(graph) {
                 diff.deleted().forEach(remove);
 
                 graph = head;
+                rebased = false;
             }
 
             return rtree.search(extentRectangle(extent))
                 .map(function(id) { return graph.entity(id); });
         },
 
-        base: function() {
+        graph: function() {
             return graph;
         }
 
diff --git a/test/spec/core/tree.js b/test/spec/core/tree.js
index d279bc0f3..5684ba6a8 100644
--- a/test/spec/core/tree.js
+++ b/test/spec/core/tree.js
@@ -5,13 +5,33 @@ describe("iD.Tree", function() {
         tree = iD.Tree(iD.Graph());
     });
 
-    describe("intersects", function() {
+    describe("#rebase", function() {
+        it("adds entities to the tree", function() {
+            var node = iD.Node({ id: 'n', loc: [1, 1]});
+            tree.graph().rebase({ 'n': node });
+            tree.rebase(['n']);
+            expect(tree.intersects(iD.geo.Extent([0, 0], [2, 2]), tree.graph())).to.eql([node]);
+        });
+    });
+
+    describe("#intersects", function() {
         it("excludes entities with missing children, adds them when all are present", function() {
             var way = iD.Way({id: 'w1', nodes: ['n']});
-            var g = tree.base().replace(way);
+            var g = tree.graph().replace(way);
             expect(tree.intersects(iD.geo.Extent([0, 0], [1, 1]), g)).to.eql([]);
             var node = iD.Node({id: 'n', loc: [0.5, 0.5]});
-            g = tree.base().replace(node);
+            g = tree.graph().replace(node);
+            expect(tree.intersects(iD.geo.Extent([0, 0], [1, 1]), g)).to.eql([way, node]);
+        });
+
+        it("includes entities that used to have missing children, after rebase added them", function() {
+            var base = tree.graph();
+            var way = iD.Way({id: 'w1', nodes: ['n']});
+            var g = base.replace(way);
+            expect(tree.intersects(iD.geo.Extent([0, 0], [1, 1]), g)).to.eql([]);
+            var node = iD.Node({id: 'n', loc: [0.5, 0.5]});
+            base.rebase({ 'n': node });
+            tree.rebase(['n']);
             expect(tree.intersects(iD.geo.Extent([0, 0], [1, 1]), g)).to.eql([way, node]);
         });
     });