diff --git a/app/javascript/flavours/glitch/reducers/compose.js b/app/javascript/flavours/glitch/reducers/compose.js
index 1edc70add..b1c792406 100644
--- a/app/javascript/flavours/glitch/reducers/compose.js
+++ b/app/javascript/flavours/glitch/reducers/compose.js
@@ -578,6 +578,10 @@ export default function compose(state = initialState, action) {
       if (action.status.get('spoiler_text').length > 0) {
         map.set('spoiler', true);
         map.set('spoiler_text', action.status.get('spoiler_text'));
+
+        if (map.get('media_attachments').size >= 1) {
+          map.set('sensitive', true);
+        }
       } else {
         map.set('spoiler', false);
         map.set('spoiler_text', '');