diff --git a/app/soapbox/features/compose/containers/sensitive_button_container.js b/app/soapbox/features/compose/containers/sensitive_button_container.js
index dc98de561..3497c0009 100644
--- a/app/soapbox/features/compose/containers/sensitive_button_container.js
+++ b/app/soapbox/features/compose/containers/sensitive_button_container.js
@@ -12,6 +12,7 @@ const messages = defineMessages({
 
 const mapStateToProps = state => ({
   active: state.getIn(['compose', 'sensitive']),
+  disabled: state.getIn(['compose', 'spoiler']),
 });
 
 const mapDispatchToProps = dispatch => ({
@@ -26,12 +27,13 @@ class SensitiveButton extends React.PureComponent {
 
   static propTypes = {
     active: PropTypes.bool,
+    disabled: PropTypes.bool,
     onClick: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
   };
 
   render() {
-    const { active, onClick, intl } = this.props;
+    const { active, disabled, onClick, intl } = this.props;
 
     return (
       <div className='compose-form__sensitive-button'>
@@ -41,6 +43,7 @@ class SensitiveButton extends React.PureComponent {
             type='checkbox'
             checked={active}
             onChange={onClick}
+            disabled={disabled}
           />
 
           <span className={classNames('checkbox', { active })} />
diff --git a/app/soapbox/reducers/__tests__/compose-test.js b/app/soapbox/reducers/__tests__/compose-test.js
index 62eb472a9..230036fe8 100644
--- a/app/soapbox/reducers/__tests__/compose-test.js
+++ b/app/soapbox/reducers/__tests__/compose-test.js
@@ -169,8 +169,18 @@ describe('compose reducer', () => {
     });
   });
 
+  it('should handle COMPOSE_SENSITIVITY_CHANGE on Mark Sensitive click, don\'t toggle if spoiler active', () => {
+    const state = ImmutableMap({ spoiler: true, sensitive: true, idempotencyKey: null });
+    const action = {
+      type: actions.COMPOSE_SENSITIVITY_CHANGE,
+    };
+    expect(reducer(state, action).toJS()).toMatchObject({
+      sensitive: true,
+    });
+  });
+
   it('should handle COMPOSE_SENSITIVITY_CHANGE on Mark Sensitive click, toggle if spoiler inactive', () => {
-    const state = ImmutableMap({ sensitive: true });
+    const state = ImmutableMap({ spoiler: false, sensitive: true });
     const action = {
       type: actions.COMPOSE_SENSITIVITY_CHANGE,
     };
diff --git a/app/soapbox/reducers/compose.js b/app/soapbox/reducers/compose.js
index 60418da85..28074b347 100644
--- a/app/soapbox/reducers/compose.js
+++ b/app/soapbox/reducers/compose.js
@@ -117,7 +117,7 @@ function appendMedia(state, media) {
     map.set('resetFileKey', Math.floor((Math.random() * 0x10000)));
     map.set('idempotencyKey', uuid());
 
-    if (prevSize === 0 && state.get('default_sensitive')) {
+    if (prevSize === 0 && (state.get('default_sensitive') || state.get('spoiler'))) {
       map.set('sensitive', true);
     }
   });
@@ -214,7 +214,10 @@ export default function compose(state = initialState, action) {
       .set('is_composing', false);
   case COMPOSE_SENSITIVITY_CHANGE:
     return state.withMutations(map => {
-      map.set('sensitive', !state.get('sensitive'));
+      if (!state.get('spoiler')) {
+        map.set('sensitive', !state.get('sensitive'));
+      }
+
       map.set('idempotencyKey', uuid());
     });
   case COMPOSE_TYPE_CHANGE:
@@ -227,6 +230,10 @@ export default function compose(state = initialState, action) {
       map.set('spoiler_text', '');
       map.set('spoiler', !state.get('spoiler'));
       map.set('idempotencyKey', uuid());
+
+      if (!state.get('sensitive') && state.get('media_attachments').size >= 1) {
+        map.set('sensitive', true);
+      }
     });
   case COMPOSE_SPOILER_TEXT_CHANGE:
     return state