diff --git a/src/CallHandler.js b/src/CallHandler.js
index 671d8278ff..0915a65af2 100644
--- a/src/CallHandler.js
+++ b/src/CallHandler.js
@@ -116,6 +116,10 @@ function _setCallListeners(call) {
             _setCallState(call, call.roomId, "busy");
             pause("ringbackAudio");
             play("busyAudio");
+            Modal.createDialog(ErrorDialog, {
+                title: "Call Timeout",
+                description: "The remote side failed to pick up."
+            });
         }
         else if (oldState === "invite_sent") {
             _setCallState(call, call.roomId, "stop_ringback");
diff --git a/src/controllers/organisms/MemberList.js b/src/controllers/organisms/MemberList.js
index 6021d0fc9a..89dd985564 100644
--- a/src/controllers/organisms/MemberList.js
+++ b/src/controllers/organisms/MemberList.js
@@ -18,6 +18,9 @@ limitations under the License.
 
 var React = require("react");
 var MatrixClientPeg = require("../../MatrixClientPeg");
+var Modal = require("../../Modal");
+var ComponentBroker = require('../../ComponentBroker');
+var ErrorDialog = ComponentBroker.get("organisms/ErrorDialog");
 
 var INITIAL_LOAD_NUM_MEMBERS = 50;
 
@@ -67,6 +70,10 @@ module.exports = {
         inputText = inputText.trim(); // react requires es5-shim so we know trim() exists
         if (inputText[0] !== '@' || inputText.indexOf(":") === -1) {
             console.error("Bad user ID to invite: %s", inputText);
+            Modal.createDialog(ErrorDialog, {
+                title: "Invite Error",
+                description: "Malformed user ID. Should look like '@localpart:domain'"
+            });
             return;
         }
         self.setState({
@@ -81,6 +88,10 @@ module.exports = {
             });
         }, function(err) {
             console.error("Failed to invite: %s", JSON.stringify(err));
+            Modal.createDialog(ErrorDialog, {
+                title: "Invite Server Error",
+                description: err.message
+            });
             self.setState({
                 inviting: false
             });