diff --git a/app/src/main/java/app/fedilab/android/mastodon/activities/ComposeActivity.java b/app/src/main/java/app/fedilab/android/mastodon/activities/ComposeActivity.java
index 5a01eabb..db86865d 100644
--- a/app/src/main/java/app/fedilab/android/mastodon/activities/ComposeActivity.java
+++ b/app/src/main/java/app/fedilab/android/mastodon/activities/ComposeActivity.java
@@ -963,8 +963,8 @@ public class ComposeActivity extends BaseActivity implements ComposeAdapter.Mana
             return 0;
         }
         SharedPreferences sharedpreferences = PreferenceManager.getDefaultSharedPreferences(this);
-        boolean checkAlt = sharedpreferences.getBoolean(getString(R.string.SET_MANDATORY_ALT_TEXT), false);
-        boolean warnOnly = sharedpreferences.getBoolean(getString(R.string.SET_MANDATORY_ALT_TEXT_WARN), false);
+        boolean checkAlt = sharedpreferences.getBoolean(getString(R.string.SET_MANDATORY_ALT_TEXT), true);
+        boolean warnOnly = sharedpreferences.getBoolean(getString(R.string.SET_MANDATORY_ALT_TEXT_WARN), true);
         if (checkAlt) {
             for (Status status : statusDraft.statusDraftList) {
                 if (status.media_attachments != null && status.media_attachments.size() > 0) {
diff --git a/app/src/main/res/xml/pref_compose.xml b/app/src/main/res/xml/pref_compose.xml
index 6cb07491..6054966a 100644
--- a/app/src/main/res/xml/pref_compose.xml
+++ b/app/src/main/res/xml/pref_compose.xml
@@ -67,7 +67,7 @@
         app:useSimpleSummaryProvider="true" />
 
     <SwitchPreferenceCompat
-        app:defaultValue="false"
+        app:defaultValue="true"
         app:iconSpaceReserved="false"
         app:key="@string/SET_MANDATORY_ALT_TEXT"
         app:singleLineTitle="false"
@@ -75,7 +75,7 @@
         app:title="@string/set_alt_text_mandatory" />
 
     <SwitchPreferenceCompat
-        app:defaultValue="false"
+        app:defaultValue="true"
         app:dependency="@string/SET_MANDATORY_ALT_TEXT"
         app:iconSpaceReserved="false"
         app:key="@string/SET_MANDATORY_ALT_TEXT_WARN"
diff --git a/src/fdroid/fastlane/metadata/android/en/changelogs/484.txt b/src/fdroid/fastlane/metadata/android/en/changelogs/484.txt
index bca71360..f28fa218 100644
--- a/src/fdroid/fastlane/metadata/android/en/changelogs/484.txt
+++ b/src/fdroid/fastlane/metadata/android/en/changelogs/484.txt
@@ -3,7 +3,7 @@ Added:
 - Add a settings to automatically fetch remote media when it fails (default: disabled)
 
 Changed:
-
+- Warn when there are missing descriptions enabled by default
 
 Fixed:
 - Some settings not properly restored (multiple choices)
\ No newline at end of file