diff --git a/src/components/structures/RoomView.js b/src/components/structures/RoomView.js
index 0ddbd06b4f..4f20b354d3 100644
--- a/src/components/structures/RoomView.js
+++ b/src/components/structures/RoomView.js
@@ -730,8 +730,19 @@ module.exports = React.createClass({
         if (!MatrixClientPeg.get().isRoomEncrypted(room.roomId)) {
             return;
         }
+        if (!MatrixClientPeg.get().isCryptoEnabled()) {
+            // If crypto is not currently enabled, we aren't tracking devices at all,
+            // so we don't know what the answer is. Let's error on the safe side and show
+            // a warning for this case.
+            this.setState({
+                e2eStatus: "warning",
+            });
+            return;
+        }
         room.hasUnverifiedDevices().then((hasUnverifiedDevices) => {
-            this.setState({e2eStatus: hasUnverifiedDevices ? "warning" : "verified"});
+            this.setState({
+                e2eStatus: hasUnverifiedDevices ? "warning" : "verified",
+            });
         });
     },