diff --git a/src/components/views/rooms/RoomPreviewBar.js b/src/components/views/rooms/RoomPreviewBar.js
index 7715bd9339..f2573d46b8 100644
--- a/src/components/views/rooms/RoomPreviewBar.js
+++ b/src/components/views/rooms/RoomPreviewBar.js
@@ -337,8 +337,10 @@ module.exports = React.createClass({
                 title = _t("Something went wrong with your invite to %(roomName)s",
                     {roomName: this._roomName()});
                 const joinRule = this._joinRule();
-                const errCodeMessage = _t("%(errcode)s was returned while trying to valide your invite. You could try to pass this information on to a room admin.",
-                    {errcode: this.state.threePidFetchError.errcode},
+                const errCodeMessage = _t(
+                    "An error (%(errcode)s) was returned while trying to validate your " +
+                    "invite. You could try to pass this information on to a room admin.",
+                    {errcode: this.state.threePidFetchError.errcode || _t("unknown error code")},
                 );
                 switch (joinRule) {
                     case "invite":
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index d88484c283..8bfc918ada 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -892,7 +892,8 @@
     "Re-join": "Re-join",
     "You were banned from %(roomName)s by %(memberName)s": "You were banned from %(roomName)s by %(memberName)s",
     "Something went wrong with your invite to %(roomName)s": "Something went wrong with your invite to %(roomName)s",
-    "%(errcode)s was returned while trying to valide your invite. You could try to pass this information on to a room admin.": "%(errcode)s was returned while trying to valide your invite. You could try to pass this information on to a room admin.",
+    "An error (%(errcode)s) was returned while trying to validate your invite. You could try to pass this information on to a room admin.": "An error (%(errcode)s) was returned while trying to validate your invite. You could try to pass this information on to a room admin.",
+    "unknown error code": "unknown error code",
     "You can only join it with a working invite.": "You can only join it with a working invite.",
     "You can still join it because this is a public room.": "You can still join it because this is a public room.",
     "Join the discussion": "Join the discussion",
@@ -1399,7 +1400,6 @@
     "Collapse Reply Thread": "Collapse Reply Thread",
     "End-to-end encryption information": "End-to-end encryption information",
     "Failed to set Direct Message status of room": "Failed to set Direct Message status of room",
-    "unknown error code": "unknown error code",
     "Failed to forget room %(errCode)s": "Failed to forget room %(errCode)s",
     "All messages (noisy)": "All messages (noisy)",
     "All messages": "All messages",