diff --git a/index.html b/index.html
index 3cddaed4f..5dc6ad04d 100644
--- a/index.html
+++ b/index.html
@@ -118,8 +118,10 @@
         <script src="js/id/actions/add_midpoint.js"></script>
         <script src='js/id/actions/add_entity.js'></script>
         <script src='js/id/actions/add_vertex.js'></script>
+        <script src='js/id/actions/change_member.js'></script>
         <script src='js/id/actions/change_tags.js'></script>
         <script src='js/id/actions/connect.js'></script>
+        <script src='js/id/actions/delete_member.js'></script>
         <script src='js/id/actions/delete_multiple.js'></script>
         <script src='js/id/actions/delete_node.js'></script>
         <script src="js/id/actions/delete_relation.js"></script>
diff --git a/js/id/actions/change_member.js b/js/id/actions/change_member.js
new file mode 100644
index 000000000..ece118fab
--- /dev/null
+++ b/js/id/actions/change_member.js
@@ -0,0 +1,5 @@
+iD.actions.ChangeMember = function(relationId, member, memberIndex) {
+    return function(graph) {
+        return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+    }
+};
diff --git a/test/index.html b/test/index.html
index 580885630..930bf8e5e 100644
--- a/test/index.html
+++ b/test/index.html
@@ -103,6 +103,7 @@
     <script src="../js/id/actions/add_midpoint.js"></script>
     <script src='../js/id/actions/add_entity.js'></script>
     <script src='../js/id/actions/add_vertex.js'></script>
+    <script src='../js/id/actions/change_member.js'></script>
     <script src='../js/id/actions/change_tags.js'></script>
     <script src='../js/id/actions/connect.js'></script>
     <script src='../js/id/actions/delete_member.js'></script>
@@ -185,6 +186,7 @@
 
     <script src="spec/actions/add_midpoint.js"></script>
     <script src="spec/actions/add_entity.js"></script>
+    <script src="spec/actions/change_member.js"></script>
     <script src="spec/actions/change_tags.js"></script>
     <script src='spec/actions/circularize.js'></script>
     <script src='spec/actions/orthogonalize.js'></script>
diff --git a/test/index_packaged.html b/test/index_packaged.html
index 15bcef8df..b1a09c908 100644
--- a/test/index_packaged.html
+++ b/test/index_packaged.html
@@ -27,6 +27,7 @@
 
     <script src="spec/actions/add_midpoint.js"></script>
     <script src="spec/actions/add_entity.js"></script>
+    <script src="spec/actions/change_member.js"></script>
     <script src="spec/actions/change_tags.js"></script>
     <script src='spec/actions/circularize.js'></script>
     <script src='spec/actions/connect.js'></script>
diff --git a/test/spec/actions/change_member.js b/test/spec/actions/change_member.js
new file mode 100644
index 000000000..c3d4291f1
--- /dev/null
+++ b/test/spec/actions/change_member.js
@@ -0,0 +1,9 @@
+describe("iD.actions.ChangeMember", function () {
+    it("updates the member at the specified index", function () {
+        var node     = iD.Node(),
+            relation = iD.Relation({members: [{id: node.id}]}),
+            action   = iD.actions.ChangeMember(relation.id, {id: node.id, role: 'node'}, 0),
+            graph    = action(iD.Graph([node, relation]));
+        expect(graph.entity(relation.id).members).to.eql([{id: node.id, role: 'node'}]);
+    });
+});
diff --git a/test/spec/actions/delete_member.js b/test/spec/actions/delete_member.js
index bb6e9c85c..f23cdb700 100644
--- a/test/spec/actions/delete_member.js
+++ b/test/spec/actions/delete_member.js
@@ -1,7 +1,7 @@
 describe("iD.actions.DeleteMember", function () {
     it("removes the member at the specified index", function () {
         var node     = iD.Node(),
-            relation = iD.Relation({members: [node.id]}),
+            relation = iD.Relation({members: [{id: node.id}]}),
             action   = iD.actions.DeleteMember(relation.id, 0),
             graph    = action(iD.Graph([node, relation]));
         expect(graph.entity(relation.id).members).to.eql([]);