diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java
index 30100d86..145fdadc 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewPostDetailActivity.java
@@ -935,7 +935,7 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
                         }
 
                         @Override
-                        public void onFetchSubredditDataFail() {
+                        public void onFetchSubredditDataFail(boolean isQuarantined) {
                             mRespectSubredditRecommendedSortType = false;
                             ViewPostDetailActivity.this.sortType = mSortTypeSharedPreferences.getString(SharedPreferencesUtils.SORT_TYPE_POST_COMMENT, SortType.Type.BEST.value.toUpperCase());
                             if (ViewPostDetailActivity.this.sortType != null) {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java
index 3bf7fdf8..cd514c0f 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewSubredditDetailActivity.java
@@ -519,7 +519,7 @@ public class ViewSubredditDetailActivity extends BaseActivity implements SortTyp
                 }
 
                 @Override
-                public void onFetchSubredditDataFail() {
+                public void onFetchSubredditDataFail(boolean isQuarantined) {
                     makeSnackbar(R.string.cannot_fetch_subreddit_info, true);
                     mFetchSubredditInfoSuccess = false;
                 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java b/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java
index 1799ff57..67da922d 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/apis/RedditAPI.java
@@ -346,4 +346,7 @@ public interface RedditAPI {
     Call<String> addSubredditToMultiReddit(@HeaderMap Map<String, String> headers, @FieldMap Map<String, String> params,
                                            @Path(value = "multipath", encoded = true) String multipath, @Path("subredditName") String subredditName);
 
+    @FormUrlEncoded
+    @POST("/api/quarantine_optin?raw_json=1")
+    Call<String> optInQuarantinedSubreddit(@HeaderMap Map<String, String> headers, @FieldMap Map<String, String> params);
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/asynctasks/LoadSubredditIconAsyncTask.java b/app/src/main/java/ml/docilealligator/infinityforreddit/asynctasks/LoadSubredditIconAsyncTask.java
index 7092bae7..695e4e46 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/asynctasks/LoadSubredditIconAsyncTask.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/asynctasks/LoadSubredditIconAsyncTask.java
@@ -57,7 +57,7 @@ public class LoadSubredditIconAsyncTask extends AsyncTask<Void, Void, Void> {
                     }
 
                     @Override
-                    public void onFetchSubredditDataFail() {
+                    public void onFetchSubredditDataFail(boolean isQuarantined) {
                         loadSubredditIconAsyncTaskListener.loadIconSuccess(null);
                     }
                 });
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/SidebarFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/SidebarFragment.java
index 571350ce..b6fb5795 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/SidebarFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/fragments/SidebarFragment.java
@@ -193,7 +193,7 @@ public class SidebarFragment extends Fragment {
             }
 
             @Override
-            public void onFetchSubredditDataFail() {
+            public void onFetchSubredditDataFail(boolean isQuarantined) {
                 swipeRefreshLayout.setRefreshing(false);
                 Toast.makeText(activity, R.string.cannot_fetch_sidebar, Toast.LENGTH_SHORT).show();
             }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java
index 37587ede..b5e9b553 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/FetchSubredditData.java
@@ -31,17 +31,17 @@ public class FetchSubredditData {
 
                         @Override
                         public void onParseSubredditDataFail() {
-                            fetchSubredditDataListener.onFetchSubredditDataFail();
+                            fetchSubredditDataListener.onFetchSubredditDataFail(false);
                         }
                     });
                 } else {
-                    fetchSubredditDataListener.onFetchSubredditDataFail();
+                    fetchSubredditDataListener.onFetchSubredditDataFail(response.code() == 403);
                 }
             }
 
             @Override
             public void onFailure(@NonNull Call<String> call, @NonNull Throwable t) {
-                fetchSubredditDataListener.onFetchSubredditDataFail();
+                fetchSubredditDataListener.onFetchSubredditDataFail(false);
             }
         });
     }
@@ -84,7 +84,7 @@ public class FetchSubredditData {
     public interface FetchSubredditDataListener {
         void onFetchSubredditDataSuccess(SubredditData subredditData, int nCurrentOnlineSubscribers);
 
-        void onFetchSubredditDataFail();
+        void onFetchSubredditDataFail(boolean isQuarantined);
     }
 
     interface FetchSubredditListingDataListener {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditSubscription.java b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditSubscription.java
index 52664234..31615903 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditSubscription.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/subreddit/SubredditSubscription.java
@@ -56,7 +56,7 @@ public class SubredditSubscription {
                             }
 
                             @Override
-                            public void onFetchSubredditDataFail() {
+                            public void onFetchSubredditDataFail(boolean isQuarantined) {
 
                             }
                         });