diff --git a/lib/pages/full_post.dart b/lib/pages/full_post.dart
index dc8ca1e..3986224 100644
--- a/lib/pages/full_post.dart
+++ b/lib/pages/full_post.dart
@@ -115,9 +115,12 @@ class FullPostPage extends HookWidget {
                 onPressed: () => PostWidget.showMoreMenu(context, post)),
           ],
         ),
-        floatingActionButton: FloatingActionButton(
-            onPressed: loggedInAction((_) => comment()),
-            child: const Icon(Icons.comment)),
+        floatingActionButton: post.post.locked
+            ? null
+            : FloatingActionButton(
+                onPressed: loggedInAction((_) => comment()),
+                child: const Icon(Icons.comment),
+              ),
         body: RefreshIndicator(
           onRefresh: refresh,
           child: ListView(
diff --git a/lib/widgets/comment.dart b/lib/widgets/comment.dart
index a4577a6..57304ad 100644
--- a/lib/widgets/comment.dart
+++ b/lib/widgets/comment.dart
@@ -297,7 +297,9 @@ class CommentWidget extends HookWidget {
               tooltip: L10n.of(context).more,
             ),
             _SaveComment(commentTree.comment),
-            if (!isDeleted.value && !comment.comment.removed)
+            if (!isDeleted.value &&
+                !comment.comment.removed &&
+                !comment.post.locked)
               TileAction(
                 icon: Icons.reply,
                 onPressed: loggedInAction((_) => reply()),