diff --git a/src/Analytics.js b/src/Analytics.js
index 92691da1ea..0a31625ebc 100644
--- a/src/Analytics.js
+++ b/src/Analytics.js
@@ -31,6 +31,7 @@ const customVariables = {
     'User Type': 3,
     'Chosen Language': 4,
     'Instance': 5,
+    'RTE: Uses Richtext Mode': 6,
 };
 
 
@@ -145,6 +146,11 @@ class Analytics {
         if (this.disabled) return;
         this._setVisitVariable('User Type', guest ? 'Guest' : 'Logged In');
     }
+
+    setRichtextMode(state) {
+        if (this.disabled) return;
+        this._setVisitVariable('RTE: Uses Richtext Mode', state ? 'on' : 'off');
+    }
 }
 
 if (!global.mxAnalytics) {
diff --git a/src/components/views/rooms/MessageComposerInput.js b/src/components/views/rooms/MessageComposerInput.js
index b2c1436365..aa4acd7655 100644
--- a/src/components/views/rooms/MessageComposerInput.js
+++ b/src/components/views/rooms/MessageComposerInput.js
@@ -31,6 +31,7 @@ import KeyCode from '../../../KeyCode';
 import Modal from '../../../Modal';
 import sdk from '../../../index';
 import { _t } from '../../../languageHandler';
+import Analytics from '../../../Analytics';
 
 import dis from '../../../dispatcher';
 import UserSettingsStore from '../../../UserSettingsStore';
@@ -513,6 +514,8 @@ export default class MessageComposerInput extends React.Component {
             contentState = ContentState.createFromText(markdown);
         }
 
+        Analytics.setRichtextMode(enabled);
+
         this.setState({
             editorState: this.createEditorState(enabled, contentState),
             isRichtextEnabled: enabled,